The same here. I can reproduce this bug by hitting alt-space . Title bars from all windows disappear. I need to logoff and login again to recover from this situation.
ubuntu 11.10 32bit Kernel : 3.0.0-13 generic with compiz -- You received this bug notification because you are a member of compiz packagers, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/852373 Title: Pressing ALT-Space keyboard shortcut for Activated window menu, window title bar hide and can't be activated by same key pressed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/852373/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : [email protected] Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp

