I recently reported a very similar issue (bug 903512), but after getting the GNOME update yesterday from Update Manager, the problem is much worse and now behaves just like you described (it used to freeze mid- slide, but now it's right after it finishes sliding, at it doesn't happen ALL the time, but it happens enough to render the feature completely useless).
I have no idea why this bug's importance is set to "low." This bug is severe enough that I'm going to switch back to Ubuntu 10.04 if I can't find a fix in the next couple days. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/815996 Title: Desktop occasionally freezes/locks up when switching workspaces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/815996/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs