On "Add duplicate object" the softbody baking info wasn't freed.

Note: currently the 'baking' stores the entire animation system, which
makes further animation refining (or duplicating) useless for a Baked
SoftBody. You can even delete the entire anim system.
This can be presented as a feature too (saves slow armature stuff).
However, I might check on a 'relative' bake too.

source/blender/blenkernel/intern/object.c

@@ -758,6 +758,9 @@ SoftBody *copy_softbody(SoftBody *sb)
 	sbn->bspring= NULL;
 	sbn->ctime= 0.0f;
 	
+	sbn->keys= NULL;
+	sbn->totkey= sbn->totpointkey= 0;
+	
 	return sbn;
 }
 

source/blender/blenkernel/intern/softbody.c

@@ -1189,6 +1189,8 @@ void sbObjectReset(Object *ob)
 	int a;
 	
 	if(sb==NULL) return;
+	if(sb->keys && sb->totkey) return; // only as cpu time saver
+	
 	sb->ctime= bsystem_time(ob, NULL, (float)G.scene->r.cfra, 0.0);
 	
 	object_update_softbody(ob);