Quick fix mode is prone to failures.

mitterlib/ui/helpers/gtk_messagegrid.py

@@ -90,7 +90,7 @@ class MessageGrid(gtk.ScrolledWindow, gobject.GObject):
     def selected(self):
         """Return the selected message or None if there is no selected
         message."""
-        (model, iter) = view.get_selection().get_selected()
+        (model, iter) = self._grid.get_selection().get_selected()
         if not iter:
             return None