2.5

Node editor:
- Crash could occur on ALT+LMB remove link lines (read free'd mem)
- Button labels were handled as full buttons, disabling node usage
  quite a lot, like drag, select, or create links.
  (Caused by making all node labels buttons)

Brecht: old UI_NO_HILITE can be depricated, it was for bad overdraw
issues. I guess it's OK to not handle Label buttons at all...

source/blender/editors/interface/interface_handlers.c

@@ -2843,6 +2843,8 @@ static uiBut *ui_but_find_mouse_over(ARegion *ar, int x, int y)
 		for(but=block->buttons.first; but; but= but->next) {
 			if(but->flag & UI_NO_HILITE)
 				continue;
+			if(but->type==LABEL)
+				continue;
 
 			if(ui_but_contains_pt(but, mx, my))
 				/* give precedence to already activated buttons */

source/blender/editors/space_node/node_edit.c

@@ -2118,7 +2118,7 @@ static int cut_links_exec(bContext *C, wmOperator *op)
 	if(i>1) {
 		bNodeLink *link, *next;
 		
-		for(link= snode->edittree->links.first; link; link= link->next) {
+		for(link= snode->edittree->links.first; link; link= next) {
 			next= link->next;
 			
 			if(cut_links_intersect(link, mcoords, i)) {