Sometimes I have a very strange behaviour of mouse.
I cannot use it on applications in Gnome, but it works on main menus (I mean the top line on the screen): if I log out and then I login again everything is working fine for a long time.
I have no idea how to help to debug it - I filed also a bug https://bugzilla.redhat.com/show_bug.cgi?id=951922
My system is a standard updated Fedora 18 using intel driver. This behaviour started some time after some update but I have no idea what is driving it.
Tnx