Comment 7 for bug 718926

The issue here is that Empathy unmaps it's toplevel window when you press the close button, so from the POV of BAMF and indicator-appmenu - the window has been closed and the menu resources should be freed.

I've just tested a fix for this in appmenu-gtk which seems to be working well (although it's full of debug printf's right now, which is why i've not pushed it anywhere). it basically hooks on to the map/unmap signals on the toplevel window (rather than realized/destroyed) which causes the menu to be removed/rebuilt when the top-level window is unmapped/mapped.