..update to my previous comment. No amount of resetting defaults etc, seemed to work; I was able to work around this problem and put my system back to a 'usable' state by uninstalling compiz and reinstalling & enabling "Extra" effects from the appearance applet.
Note, another behaviour I noticed was that moving the mouse cursor out of the panel area and then directly onto a window, this would allow click -- oops, this is behaviour noted in post #4 -- Window List buttons do not always respond to mouse clicks https://bugs.launchpad.net/bugs/470604 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs