Three fixes, thanks to irc reporting of Basse & Sten;

- Bone points for B-Bone drawing were not adjusted for size of Bone, now
  they draw same size as for other bone type
- Deleting bones in editmode didn't check for constraints in Pose, causing
  weird collapsed poses or even crashes
- ALT+S scaling on B-Bones in editmode didn't correct for the Object scale.

source/blender/src/drawarmature.c

@@ -332,7 +332,7 @@ static void draw_bone_solid_octahedral(void)
 /* *************** Armature drawing, bones ******************* */
 
 
-static void draw_bone_points(int dt, int armflag, unsigned int boneflag, int id, float length)
+static void draw_bone_points(int dt, int armflag, unsigned int boneflag, int id)
 {
 	/*	Draw root point if we have no IK parent */
 	if (!(boneflag & BONE_IK_TOPARENT)){
@@ -366,12 +366,11 @@ static void draw_bone_points(int dt, int armflag, unsigned int boneflag, int id,
 		BIF_ThemeColor(TH_BONE_SOLID);
 	}
 	
-	glTranslatef(0.0, length, 0.0);
+	glTranslatef(0.0, 1.0, 0.0);
 	if(dt>OB_WIRE) draw_bonevert_solid();
 	else draw_bonevert();
-	glTranslatef(0.0, -length, 0.0);
+	glTranslatef(0.0, -1.0, 0.0);
 	
-	if(length > 0.05f) length-= 0.05f;	// make vertices visible
 }
 
 static void draw_b_bone_boxes(int dt, bPoseChannel *pchan, float xwidth, float length, float zwidth)
@@ -418,7 +417,12 @@ static void draw_b_bone(int dt, int armflag, int boneflag, int constflag, unsign
 	
 	/* draw points only if... */
 	if(armflag & ARM_EDITMODE) {
-		draw_bone_points(dt, armflag, boneflag, id, length);
+		/* move to unitspace */
+		glPushMatrix();
+		glScalef(length, length, length);
+		draw_bone_points(dt, armflag, boneflag, id);
+		glPopMatrix();
+		length*= 0.95f;	// make vertices visible
 	}
 
 	/* colors for modes */
@@ -507,7 +511,7 @@ static void draw_bone(int dt, int armflag, int boneflag, int constflag, unsigned
 	}
 	
 	
-	draw_bone_points(dt, armflag, boneflag, id, 1.0);
+	draw_bone_points(dt, armflag, boneflag, id);
 	
 	/* now draw the bone itself */
 	

source/blender/src/editarmature.c

@@ -795,7 +795,6 @@ static EditBone * get_nearest_editbonepoint (int findunsel, int *selmask)
 static void delete_bone(EditBone* exBone)
 {
 	EditBone	*curBone;
-	bPoseChannel *chan;
 	
 	/*	Find any bones that refer to this bone	*/
 	for (curBone=G.edbo.first;curBone;curBone=curBone->next){
@@ -805,27 +804,47 @@ static void delete_bone(EditBone* exBone)
 		}
 	}
 	
-	/*  Erase any associated pose channel */
-	if (G.obedit->pose){
-		for (chan=G.obedit->pose->chanbase.first; chan; chan=chan->next){
-			if (!strcmp (chan->name, exBone->name)){
-				free_constraints(&chan->constraints);
-				BLI_freelinkN (&G.obedit->pose->chanbase, chan);
-				break;
-			}
-		}
-	}
 	BLI_freelinkN (&G.edbo,exBone);
 }
 
+static EditBone *editbone_name_exists (char *name);	// proto for below
+
 /* only editmode! */
 void delete_armature(void)
 {
 	EditBone	*curBone, *next;
+	bConstraint *con;
 	
 	TEST_EDITARMATURE;
 	if(okee("Erase selected bone(s)")==0) return;
 	
+	/*  First rase any associated pose channel */
+	if (G.obedit->pose){
+		bPoseChannel *chan, *next;
+		for (chan=G.obedit->pose->chanbase.first; chan; chan=next) {
+			next= chan->next;
+			curBone = editbone_name_exists (chan->name);
+			
+			if (curBone && (curBone->flag&BONE_SELECTED)) {
+				free_constraints(&chan->constraints);
+				BLI_freelinkN (&G.obedit->pose->chanbase, chan);
+			}
+			else {
+				for(con= chan->constraints.first; con; con= con->next) {
+					char *subtarget = get_con_subtarget_name(con, G.obedit);
+					if (subtarget) {
+						curBone = editbone_name_exists (subtarget);
+						if (curBone && (curBone->flag&BONE_SELECTED)) {
+							con->flag |= CONSTRAINT_DISABLE;
+							subtarget[0]= 0;
+						}
+					}
+				}
+			}
+		}
+	}
+	
+	
 	for (curBone=G.edbo.first;curBone;curBone=next){
 		next=curBone->next;
 		if (curBone->flag&BONE_SELECTED)

source/blender/src/transform.c

@@ -2227,7 +2227,7 @@ static void ElementBoneSize(TransInfo *t, TransData *td, float mat[3][3])
 	/* we've tucked the scale in loc */
 	oldy= td->iloc[1];
 	SizeToMat3(td->iloc, sizemat);
-	Mat3MulMat3(tmat, smat, sizemat);
+	Mat3MulMat3(tmat, tmat, sizemat);
 	Mat3ToSize(tmat, td->loc);
 	td->loc[1]= oldy;
 }