Comment 3 for bug 1057271

The error message doesn't necessarily have to do anything with the menu being deactivated. Even after applying a workaround that gets rid of the message (by hiding the menu before hiding the window), the menu still refuses to work after hiding the window and showing it again.

I'm a at a loss as to how to debug this. All I can say so far is that it is not the action that gets deactivated, so it must have something to do with the menu.