Comment 9 for bug 796627

This is a bug in libdbus-menu, and has already been fixed, but not backported to natty. I'm marking this as a duplicate, but you might want to ask for a backport of the fix from the libdbus-menu people.

I could also provide one in the ppa (it's a one-line change), but last time people were complaining heavily about my fixed unity packages there. Tell me what you think :-).