diff --git a/source/blender/editors/animation/keyframes_draw.c b/source/blender/editors/animation/keyframes_draw.c
index 2107e6e4252..abea38e129e 100644
--- a/source/blender/editors/animation/keyframes_draw.c
+++ b/source/blender/editors/animation/keyframes_draw.c
@@ -98,9 +98,7 @@ static ActKeyColumn *bezt_to_new_actkeycolumn(BezTriple *bezt)
 	/* store settings based on state of BezTriple */
 	ak->cfra= bezt->vec[1][0];
 	ak->sel= BEZSELECTED(bezt) ? SELECT : 0;
-	
-	// TODO: handle type = bezt->h1 or bezt->h2
-	ak->handle_type= 0; 
+	ak->key_type= BEZKEYTYPE(bezt); 
 	
 	/* set 'modified', since this is used to identify long keyframes */
 	ak->modified = 1;
@@ -134,6 +132,10 @@ static void add_bezt_to_keycolumns_list(DLRBT_Tree *keys, BezTriple *bezt)
 				if (BEZSELECTED(bezt)) ak->sel = SELECT;
 				ak->modified += 1;
 				
+				/* for keyframe type, 'proper' keyframes have priority over breakdowns (and other types for now) */
+				if (BEZKEYTYPE(bezt) == BEZT_KEYTYPE_KEYFRAME)
+					ak->key_type= BEZT_KEYTYPE_KEYFRAME;
+				
 				/* done... no need to insert */
 				return;
 			}
@@ -340,7 +342,7 @@ static const float _unit_diamond_shape[4][2] = {
 }; 
 
 /* draw a simple diamond shape with OpenGL */
-void draw_keyframe_shape (float x, float y, float xscale, float hsize, short sel, short mode)
+void draw_keyframe_shape (float x, float y, float xscale, float hsize, short sel, short key_type, short mode)
 {
 	static GLuint displist1=0;
 	static GLuint displist2=0;
@@ -371,6 +373,11 @@ void draw_keyframe_shape (float x, float y, float xscale, float hsize, short sel
 		glEndList();
 	}
 	
+	/* tweak size of keyframe shape according to type of keyframe 
+	 * 	- 'proper' keyframes have key_type=0, so get drawn at full size
+	 */
+	hsize -= 0.5f*key_type;
+	
 	/* adjust view transform before starting */
 	glTranslatef(x, y, 0.0f);
 	glScalef(1.0f/xscale*hsize, hsize, 1.0f);
@@ -381,8 +388,22 @@ void draw_keyframe_shape (float x, float y, float xscale, float hsize, short sel
 	/* draw! */
 	if ELEM(mode, KEYFRAME_SHAPE_INSIDE, KEYFRAME_SHAPE_BOTH) {
 		/* interior - hardcoded colors (for selected and unselected only) */
-		if (sel) UI_ThemeColorShade(TH_STRIP_SELECT, 50);
-		else glColor3ub(0xE9, 0xE9, 0xE9);
+		switch (key_type) {
+			case BEZT_KEYTYPE_BREAKDOWN: /* bluish frames for now */
+			{
+				if (sel) glColor3f(0.33f, 0.75f, 0.93f);
+				else glColor3f(0.70f, 0.86f, 0.91f);
+			}
+				break;
+				
+			case BEZT_KEYTYPE_KEYFRAME: /* traditional yellowish frames for now */
+			default:
+			{
+				if (sel) UI_ThemeColorShade(TH_STRIP_SELECT, 50);
+				else glColor3f(0.91f, 0.91f, 0.91f);
+			}
+				break;
+		}
 		
 		glCallList(displist2);
 	}
@@ -454,7 +475,7 @@ static void draw_keylist(View2D *v2d, DLRBT_Tree *keys, DLRBT_Tree *blocks, floa
 			/* draw using OpenGL - uglier but faster */
 			// NOTE1: a previous version of this didn't work nice for some intel cards
 			// NOTE2: if we wanted to go back to icons, these are  icon = (ak->sel & SELECT) ? ICON_SPACE2 : ICON_SPACE3;
-			draw_keyframe_shape(ak->cfra, ypos, xscale, 5.0f, (ak->sel & SELECT), KEYFRAME_SHAPE_BOTH);
+			draw_keyframe_shape(ak->cfra, ypos, xscale, 5.0f, (ak->sel & SELECT), ak->key_type, KEYFRAME_SHAPE_BOTH);
 		}	
 	}
 	
@@ -695,7 +716,7 @@ void gpl_to_keylist(bDopeSheet *ads, bGPDlayer *gpl, DLRBT_Tree *keys, DLRBT_Tre
 			
 			ak->cfra= (float)gpf->framenum;
 			ak->modified = 1;
-			ak->handle_type= 0; 
+			ak->key_type= 0; 
 			
 			if (gpf->flag & GP_FRAME_SELECT)
 				ak->sel = SELECT;
diff --git a/source/blender/editors/animation/keyframes_edit.c b/source/blender/editors/animation/keyframes_edit.c
index 77826eca87a..ac04dc7d1a8 100644
--- a/source/blender/editors/animation/keyframes_edit.c
+++ b/source/blender/editors/animation/keyframes_edit.c
@@ -655,7 +655,7 @@ static short set_bezt_bezier(BeztEditData *bed, BezTriple *bezt)
 	return 0;
 }
 
-/* Set the interpolation type of the selected BezTriples in each IPO curve to the specified one */
+/* Set the interpolation type of the selected BezTriples in each F-Curve to the specified one */
 // ANIM_editkeyframes_ipocurve_ipotype() !
 BeztEditFunc ANIM_editkeyframes_ipo(short code)
 {
@@ -669,6 +669,35 @@ BeztEditFunc ANIM_editkeyframes_ipo(short code)
 	}
 }
 
+/* ------- */
+
+static short set_keytype_keyframe(BeztEditData *bed, BezTriple *bezt) 
+{
+	if (bezt->f2 & SELECT) 
+		BEZKEYTYPE(bezt)= BEZT_KEYTYPE_KEYFRAME;
+	return 0;
+}
+
+static short set_keytype_breakdown(BeztEditData *bed, BezTriple *bezt) 
+{
+	if (bezt->f2 & SELECT) 
+		BEZKEYTYPE(bezt)= BEZT_KEYTYPE_BREAKDOWN;
+	return 0;
+}
+
+/* Set the interpolation type of the selected BezTriples in each F-Curve to the specified one */
+BeztEditFunc ANIM_editkeyframes_keytype(short code)
+{
+	switch (code) {
+		case BEZT_KEYTYPE_BREAKDOWN: /* breakdown */
+			return set_keytype_breakdown;
+			
+		case BEZT_KEYTYPE_KEYFRAME: /* proper keyframe */	
+		default:
+			return set_keytype_keyframe;
+	}
+}
+
 /* ******************************************* */
 /* Selection */
 
diff --git a/source/blender/editors/include/ED_anim_api.h b/source/blender/editors/include/ED_anim_api.h
index 179f362b13f..af37cd87254 100644
--- a/source/blender/editors/include/ED_anim_api.h
+++ b/source/blender/editors/include/ED_anim_api.h
@@ -434,7 +434,12 @@ void ED_nla_postop_refresh(bAnimContext *ac);
 /* ------------- Utility macros ----------------------- */
 
 /* checks if the given BezTriple is selected */
-#define BEZSELECTED(bezt) ((bezt->f2 & SELECT) || (bezt->f1 & SELECT) || (bezt->f3 & SELECT))
+#define BEZSELECTED(bezt) (((bezt)->f2 & SELECT) || ((bezt)->f1 & SELECT) || ((bezt)->f3 & SELECT))
+
+/* provide access to Keyframe Type info in BezTriple
+ * NOTE: this is so that we can change it from being stored in 'hide'
+ */
+#define BEZKEYTYPE(bezt) ((bezt)->hide)
 
 /* set/clear/toggle macro 
  *	- channel - channel with a 'flag' member that we're setting
diff --git a/source/blender/editors/include/ED_keyframes_draw.h b/source/blender/editors/include/ED_keyframes_draw.h
index e940aaed36e..259104f7263 100644
--- a/source/blender/editors/include/ED_keyframes_draw.h
+++ b/source/blender/editors/include/ED_keyframes_draw.h
@@ -56,8 +56,8 @@ typedef struct ActKeyColumn {
 	char tree_col;						/* DLRB_BLACK or DLRB_RED */
 	
 		/* keyframe info */
-	char sel;
-	short handle_type;
+	char key_type;						/* eBezTripe_KeyframeType */
+	short sel;
 	float cfra;
 	
 	/* only while drawing - used to determine if long-keyframe needs to be drawn */
@@ -99,7 +99,7 @@ typedef enum eKeyframeShapeDrawOpts {
 } eKeyframeShapeDrawOpts;
 
 /* draw simple diamond-shape keyframe (with OpenGL) */
-void draw_keyframe_shape (float x, float y, float xscale, float hsize, short sel, short mode);
+void draw_keyframe_shape (float x, float y, float xscale, float hsize, short sel, short key_type, short mode);
 
 /* ******************************* Methods ****************************** */
 
diff --git a/source/blender/editors/include/ED_keyframes_edit.h b/source/blender/editors/include/ED_keyframes_edit.h
index 77e95dc77de..390729eaec4 100644
--- a/source/blender/editors/include/ED_keyframes_edit.h
+++ b/source/blender/editors/include/ED_keyframes_edit.h
@@ -40,8 +40,6 @@ struct Scene;
 
 /* --------- BezTriple Selection ------------- */
 
-#define BEZSELECTED(bezt) ((bezt->f2 & SELECT) || (bezt->f1 & SELECT) || (bezt->f3 & SELECT))
-
 #define BEZ_SEL(bezt)		{ (bezt)->f1 |=  SELECT; (bezt)->f2 |=  SELECT; (bezt)->f3 |=  SELECT; }
 #define BEZ_DESEL(bezt)		{ (bezt)->f1 &= ~SELECT; (bezt)->f2 &= ~SELECT; (bezt)->f3 &= ~SELECT; }
 #define BEZ_INVSEL(bezt)	{ (bezt)->f1 ^=  SELECT; (bezt)->f2 ^=  SELECT; (bezt)->f3 ^=  SELECT; }
@@ -133,6 +131,7 @@ BeztEditFunc ANIM_editkeyframes_mirror(short mode);
 BeztEditFunc ANIM_editkeyframes_select(short mode);
 BeztEditFunc ANIM_editkeyframes_handles(short mode);
 BeztEditFunc ANIM_editkeyframes_ipo(short mode);
+BeztEditFunc ANIM_editkeyframes_keytype(short mode);
 
 /* ----------- BezTriple Callback (Assorted Utilities) ---------- */
 
diff --git a/source/blender/editors/space_action/action_edit.c b/source/blender/editors/space_action/action_edit.c
index d4709e94e5e..b087736a368 100644
--- a/source/blender/editors/space_action/action_edit.c
+++ b/source/blender/editors/space_action/action_edit.c
@@ -1038,6 +1038,77 @@ void ACT_OT_handle_type (wmOperatorType *ot)
 	RNA_def_enum(ot->srna, "type", beztriple_handle_type_items, 0, "Type", "");
 }
 
+/* ******************** Set Keyframe-Type Operator *********************** */
+
+/* this function is responsible for setting interpolation mode for keyframes */
+static void setkeytype_action_keys(bAnimContext *ac, short mode) 
+{
+	ListBase anim_data = {NULL, NULL};
+	bAnimListElem *ale;
+	int filter;
+	BeztEditFunc set_cb= ANIM_editkeyframes_keytype(mode);
+	
+	/* filter data */
+	filter= (ANIMFILTER_VISIBLE | ANIMFILTER_FOREDIT | ANIMFILTER_CURVESONLY);
+	ANIM_animdata_filter(ac, &anim_data, filter, ac->data, ac->datatype);
+	
+	/* loop through setting BezTriple interpolation
+	 * Note: we do not supply BeztEditData to the looper yet. Currently that's not necessary here...
+	 */
+	for (ale= anim_data.first; ale; ale= ale->next)
+		ANIM_fcurve_keys_bezier_loop(NULL, ale->key_data, NULL, set_cb, NULL);
+	
+	/* cleanup */
+	BLI_freelistN(&anim_data);
+}
+
+/* ------------------- */
+
+static int actkeys_keytype_exec(bContext *C, wmOperator *op)
+{
+	bAnimContext ac;
+	short mode;
+	
+	/* get editor data */
+	if (ANIM_animdata_get_context(C, &ac) == 0)
+		return OPERATOR_CANCELLED;
+	if (ac.datatype == ANIMCONT_GPENCIL) 
+		return OPERATOR_PASS_THROUGH;
+		
+	/* get handle setting mode */
+	mode= RNA_enum_get(op->ptr, "type");
+	
+	/* set handle type */
+	setkeytype_action_keys(&ac, mode);
+	
+	/* validate keyframes after editing */
+	ANIM_editkeyframes_refresh(&ac);
+	
+	/* set notifier that keyframe properties have changed */
+	WM_event_add_notifier(C, NC_ANIMATION|ND_KEYFRAME_PROP, NULL);
+	
+	return OPERATOR_FINISHED;
+}
+ 
+void ACT_OT_keyframe_type (wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name= "Set Keyframe Type";
+	ot->idname= "ACT_OT_keyframe_type";
+	ot->description= "Set type of keyframe for the seleced keyframes.";
+	
+	/* api callbacks */
+	ot->invoke= WM_menu_invoke;
+	ot->exec= actkeys_keytype_exec;
+	ot->poll= ED_operator_action_active;
+	
+	/* flags */
+	ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
+	
+	/* id-props */
+	RNA_def_enum(ot->srna, "type", beztriple_keyframe_type_items, 0, "Type", "");
+}
+
 /* ************************************************************************** */
 /* TRANSFORM STUFF */
 
diff --git a/source/blender/editors/space_action/action_header.c b/source/blender/editors/space_action/action_header.c
index e2a725164c9..f18d31915f9 100644
--- a/source/blender/editors/space_action/action_header.c
+++ b/source/blender/editors/space_action/action_header.c
@@ -168,7 +168,7 @@ static void act_edit_transformmenu(bContext *C, uiLayout *layout, void *arg_unus
 
 static void act_edit_snapmenu(bContext *C, uiLayout *layout, void *arg_unused)
 {
-	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT); // xxx?
+	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT); 
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_snap", "type", ACTKEYS_SNAP_CFRA);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_snap", "type", ACTKEYS_SNAP_NEAREST_FRAME);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_snap", "type", ACTKEYS_SNAP_NEAREST_SECOND);
@@ -177,16 +177,23 @@ static void act_edit_snapmenu(bContext *C, uiLayout *layout, void *arg_unused)
 
 static void act_edit_mirrormenu(bContext *C, uiLayout *layout, void *arg_unused)
 {
-	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT); // xxx?
+	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_mirror", "type", ACTKEYS_MIRROR_CFRA);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_mirror", "type", ACTKEYS_MIRROR_YAXIS);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_mirror", "type", ACTKEYS_MIRROR_XAXIS);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_mirror", "type", ACTKEYS_MIRROR_MARKER);
 }
 
+static void act_edit_keytypesmenu(bContext *C, uiLayout *layout, void *arg_unused)
+{
+	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT);
+	uiItemEnumO(layout, NULL, 0, "ACT_OT_keyframe_type", "type", BEZT_KEYTYPE_KEYFRAME);
+	uiItemEnumO(layout, NULL, 0, "ACT_OT_keyframe_type", "type", BEZT_KEYTYPE_BREAKDOWN);
+}
+
 static void act_edit_handlesmenu(bContext *C, uiLayout *layout, void *arg_unused)
 {
-	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT); // xxx?
+	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_handle_type", "type", HD_FREE);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_handle_type", "type", HD_AUTO);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_handle_type", "type", HD_VECT);
@@ -196,7 +203,7 @@ static void act_edit_handlesmenu(bContext *C, uiLayout *layout, void *arg_unused
 
 static void act_edit_ipomenu(bContext *C, uiLayout *layout, void *arg_unused)
 {
-	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT); // xxx?
+	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_interpolation_type", "type", BEZT_IPO_CONST);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_interpolation_type", "type", BEZT_IPO_LIN);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_interpolation_type", "type", BEZT_IPO_BEZ);
@@ -204,7 +211,7 @@ static void act_edit_ipomenu(bContext *C, uiLayout *layout, void *arg_unused)
 
 static void act_edit_expomenu(bContext *C, uiLayout *layout, void *arg_unused)
 {
-	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT); // xxx?
+	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_extrapolation_type", "type", FCURVE_EXTRAPOLATE_CONSTANT);
 	uiItemEnumO(layout, NULL, 0, "ACT_OT_extrapolation_type", "type", FCURVE_EXTRAPOLATE_LINEAR);
 }
@@ -226,6 +233,7 @@ static void act_editmenu(bContext *C, uiLayout *layout, void *arg_unused)
 	
 	uiItemS(layout);
 	
+	uiItemMenuF(layout, "Keyframe Type", 0, act_edit_keytypesmenu, NULL);
 	uiItemMenuF(layout, "Handle Type", 0, act_edit_handlesmenu, NULL);
 	uiItemMenuF(layout, "Interpolation Mode", 0, act_edit_ipomenu, NULL);
 	uiItemMenuF(layout, "Extrapolation Mode", 0, act_edit_expomenu, NULL);
diff --git a/source/blender/editors/space_action/action_intern.h b/source/blender/editors/space_action/action_intern.h
index 1aeeeff0c80..e5f0ab8994e 100644
--- a/source/blender/editors/space_action/action_intern.h
+++ b/source/blender/editors/space_action/action_intern.h
@@ -89,6 +89,7 @@ void ACT_OT_delete(struct wmOperatorType *ot);
 void ACT_OT_clean(struct wmOperatorType *ot);
 void ACT_OT_sample(struct wmOperatorType *ot);
 
+void ACT_OT_keyframe_type(struct wmOperatorType *ot);
 void ACT_OT_handle_type(struct wmOperatorType *ot);
 void ACT_OT_interpolation_type(struct wmOperatorType *ot);
 void ACT_OT_extrapolation_type(struct wmOperatorType *ot);
diff --git a/source/blender/editors/space_action/action_ops.c b/source/blender/editors/space_action/action_ops.c
index f18b6197eb3..42b033040b1 100644
--- a/source/blender/editors/space_action/action_ops.c
+++ b/source/blender/editors/space_action/action_ops.c
@@ -75,6 +75,7 @@ void action_operatortypes(void)
 	WM_operatortype_append(ACT_OT_handle_type);
 	WM_operatortype_append(ACT_OT_interpolation_type);
 	WM_operatortype_append(ACT_OT_extrapolation_type);
+	WM_operatortype_append(ACT_OT_keyframe_type);
 	WM_operatortype_append(ACT_OT_sample);
 	WM_operatortype_append(ACT_OT_clean);
 	WM_operatortype_append(ACT_OT_delete);
@@ -133,6 +134,7 @@ static void action_keymap_keyframes (wmWindowManager *wm, ListBase *keymap)
 	WM_keymap_add_item(keymap, "ACT_OT_handle_type", HKEY, KM_PRESS, 0, 0);
 	WM_keymap_add_item(keymap, "ACT_OT_interpolation_type", TKEY, KM_PRESS, KM_SHIFT, 0);
 	WM_keymap_add_item(keymap, "ACT_OT_extrapolation_type", EKEY, KM_PRESS, KM_SHIFT, 0); 
+	WM_keymap_add_item(keymap, "ACT_OT_keyframe_type", RKEY, KM_PRESS, 0, 0); 
 	
 		/* destructive */
 	WM_keymap_add_item(keymap, "ACT_OT_clean", OKEY, KM_PRESS, 0, 0);
diff --git a/source/blender/editors/space_graph/graph_header.c b/source/blender/editors/space_graph/graph_header.c
index 06d48fe20f3..dd304cd8cf3 100644
--- a/source/blender/editors/space_graph/graph_header.c
+++ b/source/blender/editors/space_graph/graph_header.c
@@ -160,7 +160,7 @@ static void graph_edit_transformmenu(bContext *C, uiLayout *layout, void *arg_un
 
 static void graph_edit_snapmenu(bContext *C, uiLayout *layout, void *arg_unused)
 {
-	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT); // xxx?
+	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_snap", "type", GRAPHKEYS_SNAP_CFRA);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_snap", "type", GRAPHKEYS_SNAP_NEAREST_FRAME);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_snap", "type", GRAPHKEYS_SNAP_NEAREST_SECOND);
@@ -169,7 +169,7 @@ static void graph_edit_snapmenu(bContext *C, uiLayout *layout, void *arg_unused)
 
 static void graph_edit_mirrormenu(bContext *C, uiLayout *layout, void *arg_unused)
 {
-	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT); // xxx?
+	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_mirror", "type", GRAPHKEYS_MIRROR_CFRA);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_mirror", "type", GRAPHKEYS_MIRROR_YAXIS);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_mirror", "type", GRAPHKEYS_MIRROR_XAXIS);
@@ -178,7 +178,7 @@ static void graph_edit_mirrormenu(bContext *C, uiLayout *layout, void *arg_unuse
 
 static void graph_edit_handlesmenu(bContext *C, uiLayout *layout, void *arg_unused)
 {
-	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT); // xxx?
+	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_handle_type", "type", HD_FREE);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_handle_type", "type", HD_AUTO);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_handle_type", "type", HD_VECT);
@@ -188,7 +188,7 @@ static void graph_edit_handlesmenu(bContext *C, uiLayout *layout, void *arg_unus
 
 static void graph_edit_ipomenu(bContext *C, uiLayout *layout, void *arg_unused)
 {
-	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT); // xxx?
+	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_interpolation_type", "type", BEZT_IPO_CONST);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_interpolation_type", "type", BEZT_IPO_LIN);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_interpolation_type", "type", BEZT_IPO_BEZ);
@@ -196,7 +196,7 @@ static void graph_edit_ipomenu(bContext *C, uiLayout *layout, void *arg_unused)
 
 static void graph_edit_expomenu(bContext *C, uiLayout *layout, void *arg_unused)
 {
-	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT); // xxx?
+	uiLayoutSetOperatorContext(layout, WM_OP_EXEC_DEFAULT);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_extrapolation_type", "type", FCURVE_EXTRAPOLATE_CONSTANT);
 	uiItemEnumO(layout, NULL, 0, "GRAPH_OT_extrapolation_type", "type", FCURVE_EXTRAPOLATE_LINEAR);
 }
diff --git a/source/blender/editors/space_nla/nla_buttons.c b/source/blender/editors/space_nla/nla_buttons.c
index facea34510e..bbf1358a37c 100644
--- a/source/blender/editors/space_nla/nla_buttons.c
+++ b/source/blender/editors/space_nla/nla_buttons.c
@@ -211,7 +211,7 @@ static void nla_panel_animdata (const bContext *C, Panel *pa)
 	/* Active Action Properties ------------------------------------- */
 	/* action */
 	row= uiLayoutRow(layout, 1);
-		uiTemplateID(row, C, &adt_ptr, "action", NULL, NULL/*"ACT_OT_new", "ACT_OT_unlink"*/); // XXX: need to make these operators
+		uiTemplateID(row, (bContext *)C, &adt_ptr, "action", NULL, NULL/*"ACT_OT_new", "ACT_OT_unlink"*/); // XXX: need to make these operators
 	
 	/* extrapolation */
 	row= uiLayoutRow(layout, 1);
diff --git a/source/blender/editors/space_nla/nla_draw.c b/source/blender/editors/space_nla/nla_draw.c
index f30954292b4..b21f37ab678 100644
--- a/source/blender/editors/space_nla/nla_draw.c
+++ b/source/blender/editors/space_nla/nla_draw.c
@@ -167,7 +167,7 @@ static void nla_action_draw_keyframes (AnimData *adt, bAction *act, View2D *v2d,
 	 *	- size is 3.0f which is smaller than the editable keyframes, so that there is a distinction
 	 */
 	for (ak= keys.first; ak; ak= ak->next)
-		draw_keyframe_shape(ak->cfra, y, xscale, 3.0f, 0, KEYFRAME_SHAPE_FRAME);
+		draw_keyframe_shape(ak->cfra, y, xscale, 3.0f, 0, ak->key_type, KEYFRAME_SHAPE_FRAME);
 	
 	/* free icons */
 	BLI_dlrbTree_free(&keys);
diff --git a/source/blender/makesdna/DNA_curve_types.h b/source/blender/makesdna/DNA_curve_types.h
index b0f089d670f..3bac2c73bcb 100644
--- a/source/blender/makesdna/DNA_curve_types.h
+++ b/source/blender/makesdna/DNA_curve_types.h
@@ -75,25 +75,28 @@ typedef struct BevPoint {
 	short f1, f2;
 } BevPoint;
 
-/* Keyframes on IPO curves and Points on Bezier Curves/Paths are generally BezTriples */
+/* Keyframes on F-Curves (allows code reuse of Bezier eval code) and 
+ * Points on Bezier Curves/Paths are generally BezTriples 
+ */
 /* note: alfa location in struct is abused by Key system */
 /* vec in BezTriple looks like this:
 	vec[0][0]=x location of handle 1
 	vec[0][1]=y location of handle 1
-	vec[0][2]=z location of handle 1 (not used for IpoCurve Points(2d))
+	vec[0][2]=z location of handle 1 (not used for FCurve Points(2d))
 	vec[1][0]=x location of control point
 	vec[1][1]=y location of control point
 	vec[1][2]=z location of control point
 	vec[2][0]=x location of handle 2
 	vec[2][1]=y location of handle 2
-	vec[2][2]=z location of handle 2 (not used for IpoCurve Points(2d))
+	vec[2][2]=z location of handle 2 (not used for FCurve Points(2d))
 */
 typedef struct BezTriple {
 	float vec[3][3];
 	float alfa, weight, radius;	/* alfa: tilt in 3D View, weight: used for softbody goal weight, radius: for bevel tapering */
 	short ipo;					/* ipo: interpolation mode for segment from this BezTriple to the next */
 	char h1, h2; 				/* h1, h2: the handle type of the two handles */
-	char f1, f2, f3, hide;		/* f1, f2, f3: used for selection status,  hide: used to indicate whether BezTriple is hidden */
+	char f1, f2, f3;			/* f1, f2, f3: used for selection status */
+	char hide;					/* hide: used to indicate whether BezTriple is hidden (3D), type of keyframe (eBezTriple_KeyframeTypes) */
 } BezTriple;
 
 /* note; alfa location in struct is abused by Key system */
@@ -279,6 +282,12 @@ typedef enum eBezTriple_Interpolation {
 	BEZT_IPO_BEZ,		/* bezier interpolation */
 } eBezTriple_Interpolation;
 
+/* types of keyframe (used only for BezTriple->hide when BezTriple is used in F-Curves) */
+typedef enum eBezTriple_KeyframeType {
+	BEZT_KEYTYPE_KEYFRAME = 0,	/* default - 'proper' Keyframe */
+	BEZT_KEYTYPE_BREAKDOWN,		/* 'breakdown' keyframe */
+} eBezTriple_KeyframeType;
+
 /* *************** CHARINFO **************** */
 
 /* flag */
diff --git a/source/blender/makesrna/RNA_enum_types.h b/source/blender/makesrna/RNA_enum_types.h
index 3bba474677f..a59fc8716ec 100644
--- a/source/blender/makesrna/RNA_enum_types.h
+++ b/source/blender/makesrna/RNA_enum_types.h
@@ -38,6 +38,7 @@ extern EnumPropertyItem modifier_type_items[];
 extern EnumPropertyItem constraint_type_items[];
 extern EnumPropertyItem boidrule_type_items[];
 
+extern EnumPropertyItem beztriple_keyframe_type_items[];
 extern EnumPropertyItem beztriple_handle_type_items[];
 extern EnumPropertyItem beztriple_interpolation_mode_items[];
 
diff --git a/source/blender/makesrna/intern/rna_curve.c b/source/blender/makesrna/intern/rna_curve.c
index bb094eef962..503ca031fb6 100644
--- a/source/blender/makesrna/intern/rna_curve.c
+++ b/source/blender/makesrna/intern/rna_curve.c
@@ -48,6 +48,11 @@ EnumPropertyItem beztriple_interpolation_mode_items[] = {
 		{BEZT_IPO_LIN, "LINEAR", 0, "Linear", ""},
 		{BEZT_IPO_BEZ, "BEZIER", 0, "Bezier", ""},
 		{0, NULL, 0, NULL, NULL}};
+		
+EnumPropertyItem beztriple_keyframe_type_items[] = {
+		{BEZT_KEYTYPE_KEYFRAME, "KEYFRAME", 0, "Keyframe", ""},
+		{BEZT_KEYTYPE_BREAKDOWN, "BREAKDOWN", 0, "Breakdown", ""},
+		{0, NULL, 0, NULL, NULL}};
 
 #ifdef RNA_RUNTIME
 
@@ -155,7 +160,10 @@ static void rna_Curve_update_data(bContext *C, PointerRNA *ptr)
 	Scene *scene= CTX_data_scene(C);
 	Curve *cu= ptr->id.data;
 	Object *ob;
-
+	
+	if (cu == NULL)
+		return;
+	
 	for(ob=bmain->object.first; ob; ob= ob->id.next) {
 		if(ob->data == cu) {
 			/* XXX this will loop over all objects again (slow) */
@@ -259,10 +267,15 @@ static void rna_def_beztriple(BlenderRNA *brna)
 
 	prop= RNA_def_property(srna, "interpolation", PROP_ENUM, PROP_NONE);
 	RNA_def_property_enum_sdna(prop, NULL, "ipo");
-	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
 	RNA_def_property_enum_items(prop, beztriple_interpolation_mode_items);
 	RNA_def_property_ui_text(prop, "Interpolation", "(For F-Curves Only) Interpolation to use for segment of curve starting from current BezTriple.");
-	RNA_def_property_update(prop, 0, "rna_Curve_update_data");
+	//RNA_def_property_update(prop, 0, "rna_Curve_update_data"); // this should be an F-Curve update call instead...
+	
+	prop= RNA_def_property(srna, "keyframe_type", PROP_ENUM, PROP_NONE);
+	RNA_def_property_enum_sdna(prop, NULL, "hide");
+	RNA_def_property_enum_items(prop, beztriple_keyframe_type_items);
+	RNA_def_property_ui_text(prop, "Keyframe Type", "(For F-Curves only) The type of keyframe this control point defines.");
+	//RNA_def_property_update(prop, 0, "rna_Curve_update_data"); // this should be an F-Curve update call instead...
 
 	/* Vector values */
 	prop= RNA_def_property(srna, "handle1", PROP_FLOAT, PROP_TRANSLATION);