diff --git a/release/freedesktop/blender-thumbnailer.py b/release/freedesktop/blender-thumbnailer.py
index 5274da103b9..27d6259d172 100755
--- a/release/freedesktop/blender-thumbnailer.py
+++ b/release/freedesktop/blender-thumbnailer.py
@@ -25,57 +25,54 @@ To run automatically with nautilus:
    gconftool --type string --set /desktop/gnome/thumbnailers/application@x-blender/command "blender-thumbnailer.py %i %o"
 """
 
-import os
 import struct
-import sys
 
 def blend_extract_thumb(path):
+    import os
+
     # def MAKE_ID(tag): ord(tag[0])<<24 | ord(tag[1])<<16 | ord(tag[2])<<8 | ord(tag[3])
     REND = 1145980242 # MAKE_ID(b'REND')
     TEST = 1414743380 # MAKE_ID(b'TEST')
 
     blendfile = open(path, 'rb')
 
-    head = blendfile.read(7)
+    head = blendfile.read(12)
 
     if head[0:2] == b'\x1f\x8b': # gzip magic
         import gzip
         blendfile.close()
         blendfile = gzip.open(path, 'rb')
-        head = blendfile.read(7)
+        head = blendfile.read(12)
 
-    if head != b'BLENDER':
+    if not head.startswith(b'BLENDER'):
         blendfile.close()
         return None, 0, 0
 
-    is_64_bit = (blendfile.read(1) == b'-')
+    is_64_bit = (head[7] == b'-')
 
     # true for PPC, false for X86
-    is_big_endian = (blendfile.read(1) == b'V')
+    is_big_endian = (head[8] == b'V')
 
-    # Now read the bhead chunk!!!
-    blendfile.read(3) # skip the version
-
-    sizeof_pointer = 8 if is_64_bit else 4
+    # blender pre 2.5 had no thumbs
+    if head[9:11] <= b'24':
+        return None, 0, 0
 
     sizeof_bhead = 24 if is_64_bit else 20
-    
-    int_endian = '>i' if is_big_endian else '<i'
     int_endian_pair = '>ii' if is_big_endian else '<ii'
-    
+
     while True:
-        try:
-            code, length = struct.unpack(int_endian_pair, blendfile.read(8)) # 8 == sizeof(int) * 2
-        except IOError:
+        bhead = blendfile.read(sizeof_bhead)
+
+        if len(bhead) < sizeof_bhead:
             return None, 0, 0
-        
-        # finally read the rest of the bhead struct, pointer and 2 ints
-        blendfile.seek(sizeof_bhead - 8, os.SEEK_CUR)
+
+        code, length = struct.unpack(int_endian_pair, bhead[0:8]) # 8 == sizeof(int) * 2
 
         if code == REND:
             blendfile.seek(length, os.SEEK_CUR)
         else:
             break
+            
     
     if code != TEST:
         return None, 0, 0
@@ -86,12 +83,12 @@ def blend_extract_thumb(path):
         return None, 0, 0
 
     length -= 8 # sizeof(int) * 2
-    
+
     if length != x * y * 4:
         return None, 0, 0
-    
+
     image_buffer = blendfile.read(length)
-    
+
     if len(image_buffer) != length:
         return None, 0, 0
 
@@ -104,7 +101,7 @@ def write_png(buf, width, height):
     # reverse the vertical line order and add null bytes at the start
     width_byte_4 = width * 4
     raw_data = b"".join([b'\x00' + buf[span:span + width_byte_4] for span in range((height - 1) * width * 4, -1, - width_byte_4)])
-    
+
     def png_pack(png_tag, data):
         chunk_head = png_tag + data
         return struct.pack("!I", len(data)) + chunk_head + struct.pack("!I", 0xFFFFFFFF & zlib.crc32(chunk_head))
@@ -117,6 +114,8 @@ def write_png(buf, width, height):
 
 
 if __name__ == '__main__':
+    import sys
+
     if len(sys.argv) < 2:
         print("Expected 2 arguments <input.blend> <output.png>")
     else:
diff --git a/source/blender/editors/interface/interface_templates.c b/source/blender/editors/interface/interface_templates.c
index ecbdab98257..53a9b85b980 100644
--- a/source/blender/editors/interface/interface_templates.c
+++ b/source/blender/editors/interface/interface_templates.c
@@ -195,7 +195,7 @@ static void id_search_cb(const bContext *C, void *arg_template, char *str, uiSea
 
 					RNA_parameter_set_lookup(&parms, "context", &C);
 
-					if (RNA_function_call(C, &reports, &ptr, func, &parms) == 0) {
+					if (RNA_function_call((bContext *)C, &reports, &ptr, func, &parms) == 0) {
 						int* ret;
 						RNA_parameter_get_lookup(&parms, "ret", (void **)&ret);
 
diff --git a/source/blender/imbuf/intern/thumbs_blend.c b/source/blender/imbuf/intern/thumbs_blend.c
index 7f1c903e9de..cb27b1a647f 100644
--- a/source/blender/imbuf/intern/thumbs_blend.c
+++ b/source/blender/imbuf/intern/thumbs_blend.c
@@ -40,16 +40,14 @@
 
 static ImBuf *loadblend_thumb(gzFile gzfile)
 {
-	char buf[8];
-	int code= 0;
+	char buf[12];
+	int bhead[24/sizeof(int)]; /* max size on 64bit */
 	char endian, pointer_size;
 	char endian_switch;
-	int len, im_len, x, y;
-	ImBuf *img= NULL;
-
+	int sizeof_bhead ;
 
 	/* read the blend file header */
-	if(gzread(gzfile, buf, 8) != 8)
+	if(gzread(gzfile, buf, 12) != 12)
 		return NULL;
 	if(strncmp(buf, "BLENDER", 7))
 		return NULL;
@@ -61,38 +59,23 @@ static ImBuf *loadblend_thumb(gzFile gzfile)
 	else
 		return NULL;
 
-	/* read the next 4 bytes, only need the first char, ignore the version */
-	/* endian and vertsion (ignored) */
-	if(gzread(gzfile, buf, 4) != 4)
-		return NULL;
+	 sizeof_bhead = 16 + pointer_size;
 
-	if(buf[0]=='V')
+	if(buf[8]=='V')
 		endian= B_ENDIAN; /* big: PPC */
-	else if(buf[0]=='v')
+	else if(buf[8]=='v')
 		endian= L_ENDIAN; /* little: x86 */
 	else
 		return NULL;
 
-	while(gzread(gzfile, &code, sizeof(int)) == sizeof(int)) {
-		endian_switch = ((ENDIAN_ORDER != endian)) ? 1 : 0;
-
-		if(gzread(gzfile, buf, sizeof(int)) != sizeof(int))
-			return NULL;
-
-		len = *( (int *)((void *)buf) );
+	endian_switch = ((ENDIAN_ORDER != endian)) ? 1 : 0;
 
+	while(gzread(gzfile, bhead, sizeof_bhead) == sizeof_bhead) {
 		if(endian_switch)
-			SWITCH_INT(len);
+			SWITCH_INT(bhead[1]); /* length */
 
-		/* finally read the rest of the bhead struct, pointer and 2 ints */
-		if(gzread(gzfile, buf, pointer_size) != pointer_size)
-			return NULL;
-		if(gzread(gzfile, buf, sizeof(int) * 2) != sizeof(int) * 2)
-			return NULL;
-
-		/* we dont actually care whats in the bhead */
-		if (code==REND) {
-			gzseek(gzfile, len, SEEK_CUR); /* skip to the next */
+		if (bhead[0]==REND) {
+			gzseek(gzfile, bhead[1], SEEK_CUR); /* skip to the next */
 		}
 		else {
 			break;
@@ -100,35 +83,36 @@ static ImBuf *loadblend_thumb(gzFile gzfile)
 	}
 
 	/* using 'TEST' since new names segfault when loading in old blenders */
-	if(code != TEST)
-		return NULL;
+	if(bhead[0] == TEST) {
+		ImBuf *img= NULL;
+		int size[2];
 
-	if(gzread(gzfile, &x, sizeof(int)) != sizeof(int))
-		return NULL;
-	if(gzread(gzfile, &y, sizeof(int)) != sizeof(int))
-		return NULL;
+		if(gzread(gzfile, size, sizeof(size)) != sizeof(size))
+			return NULL;
 
-	len -= sizeof(int) * 2;
+		if(endian_switch) {
+			SWITCH_INT(size[0]);
+			SWITCH_INT(size[1]);
+		}
+		/* length */
+		bhead[1] -= sizeof(int) * 2;
 
-	if(endian_switch) {
-		SWITCH_INT(x);
-		SWITCH_INT(y);
+		/* inconsistant image size, quit early */
+		if(bhead[1] != size[0] * size[1] * sizeof(int))
+			return NULL;
+	
+		/* finally malloc and read the data */
+		img= IMB_allocImBuf(size[0], size[1], 32, IB_rect | IB_metadata, 0);
+	
+		if(gzread(gzfile, img->rect, bhead[1]) != bhead[1]) {
+			IMB_freeImBuf(img);
+			img= NULL;
+		}
+	
+		return img;
 	}
-
-	/* inconsistant image size, quit early */
-	im_len = x * y * sizeof(int);
-	if(im_len != len)
-		return NULL;
-
-	/* finally malloc and read the data */
-	img= IMB_allocImBuf(x, y, 32, IB_rect | IB_metadata, 0);
-
-	if(gzread(gzfile, img->rect, len) != len) {
-		IMB_freeImBuf(img);
-		img= NULL;
-	}
-
-	return img;
+	
+	return NULL;
 }
 
 ImBuf *IMB_loadblend_thumb(const char *path)
diff --git a/source/blender/makesrna/intern/rna_controller.c b/source/blender/makesrna/intern/rna_controller.c
index c66ce532351..43297f29945 100644
--- a/source/blender/makesrna/intern/rna_controller.c
+++ b/source/blender/makesrna/intern/rna_controller.c
@@ -103,6 +103,7 @@ static void rna_Controller_state_number_set(struct PointerRNA *ptr, const int va
 	cont->state_mask = (1 << (value - 1));
 }
 
+#if 0 /* editable is set to false, comment for now. */
 static void rna_Controller_state_get(PointerRNA *ptr, int *values)
 {
 	bController *cont= (bController *)ptr->data;
@@ -113,7 +114,6 @@ static void rna_Controller_state_get(PointerRNA *ptr, int *values)
 		values[i] = (cont->state_mask & (1<<i));
 }
 
-#if 0 /* editable is set to false, comment for now. */
 static void rna_Controller_state_set(PointerRNA *ptr, const int *values)
 {
 	bController *cont= (bController *)ptr->data;
diff --git a/source/blender/windowmanager/intern/wm_files.c b/source/blender/windowmanager/intern/wm_files.c
index fc7bf9b79c7..86e08118e54 100644
--- a/source/blender/windowmanager/intern/wm_files.c
+++ b/source/blender/windowmanager/intern/wm_files.c
@@ -689,14 +689,14 @@ void wm_autosave_location(char *filename)
 	sprintf(pidstr, "%d.blend", abs(getpid()));
 	
 #ifdef WIN32
-	// XXX Need to investigate how to handle default location of '/tmp/'
-	// This is a relative directory on Windows, and it may be
-	// found. Example:
-	// Blender installed on D:\ drive, D:\ drive has D:\tmp\
-	// Now, BLI_exists() will find '/tmp/' exists, but
-	// BLI_make_file_string will create string that has it most likely on C:\
-	// through get_default_root().
-	// If there is no C:\tmp autosave fails.
+	/* XXX Need to investigate how to handle default location of '/tmp/'
+	 * This is a relative directory on Windows, and it may be
+	 * found. Example:
+	 * Blender installed on D:\ drive, D:\ drive has D:\tmp\
+	 * Now, BLI_exists() will find '/tmp/' exists, but
+	 * BLI_make_file_string will create string that has it most likely on C:\
+	 * through get_default_root().
+	 * If there is no C:\tmp autosave fails. */
 	if (!BLI_exists(U.tempdir)) {
 		savedir = BLI_get_folder_create(BLENDER_USER_AUTOSAVE, NULL);
 		BLI_make_file_string("/", filename, savedir, pidstr);
diff --git a/source/blender/windowmanager/intern/wm_operators.c b/source/blender/windowmanager/intern/wm_operators.c
index 09c11bcfda5..370dd111936 100644
--- a/source/blender/windowmanager/intern/wm_operators.c
+++ b/source/blender/windowmanager/intern/wm_operators.c
@@ -2702,7 +2702,7 @@ int WM_radial_control_modal(bContext *C, wmOperator *op, wmEvent *event)
 	float dist;
 	double new_value = RNA_float_get(op->ptr, "new_value");
 	int ret = OPERATOR_RUNNING_MODAL;
-	float initial_value = RNA_float_get(op->ptr, "initial_value");
+	// float initial_value = RNA_float_get(op->ptr, "initial_value");
 
 	mode = RNA_int_get(op->ptr, "mode");
 	RNA_int_get_array(op->ptr, "initial_mouse", initial_mouse);