--- a/UIPainter.st	Wed Mar 05 23:15:24 2014 +0100
+++ b/UIPainter.st	Wed Mar 05 23:17:16 2014 +0100
@@ -3374,7 +3374,7 @@
     (self isEditingSpecOnly or:[selectorOrMenu class == Menu]) ifTrue: [
         editor openModalOnMenu:(selectorOrMenu).
         editor hasSaved ifTrue:[
-            windowSpec perform:(menuSelector,':')asSymbol with:(editor savedSpec).
+            windowSpec perform:menuSelector asMutator with:(editor savedSpec).
             self accept.
         ].
     ] ifFalse: [