Comment 6 for bug 13590

I have the same problem. It is not the problem of application hangs.

My problem:
I have firefox and terminal opened. But when i press alt+tab, I can only see firefox icon. but not terminal icon. The same happened when using Midori browser. But, i can use the applications by clicking it on the launcher. As the application is working well when clicking its icon on launcher, the application did not crash. It is the problem with unity.

I have this problem in 12.04 beta. I've never faced this broblem in 11.10.