Comment 3 for bug 866752

The might move to fast now or something. They disappear for me. They are still open according to the dash though.

EXAMPLE: firefox maximised on desktop 2. meta+s and go to desktop 1, meta+s back to desktop 2 and firefox is gone. meta+s to empty desktop 4 and then meta+s back to desktop 2 and firefox is back, sometimes...

It's a very weird behaviour and not consistent. I have downgraded to the version in oneiric. Let me know if I can help test something.