I think you will find this bug was Fix Released in quantal about 5 hours ago:
compiz (1:0.9.8+bzr3249-0ubuntu1) quantal-proposed; urgency=low ** Changed in: compiz (Ubuntu) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/862430 Title: window flicker for a short time after switching workspaces To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/862430/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs