I tried to report a bug but ubuntu-bug directed me here so here we go:
I recently installed Natty (new install with an old /home partition) and started to use Unity (have not used it before). Unity works fine for me except the fact that after some time, top panel stops responding to grabbing and double and middle clicking. The time it takes to stop responding varies and I have not been able to figure out what triggers it.
Global menu works, as well as indicators and launcher, I can acces the top panel with F10. I am not even sure it is a Unity and not a compiz bug. Has anyone encoutered this? Have you any idea if something in my configuration might be using it? Right after logon, the panel works as expected.