I can reproduce this bug; see the attached screenshots. The windows are rendered on top of the dash, and also on top of the alt+tab dialog. However, you can "click through" them, and the dash also has keyboard focus.
For me, I can reproduce this 100% with maximized windows, and most of the time with normal windows. My graphics are intel i915. Package versions: unity: 4.22.0-0ubuntu3 compiz: 1:0.9.6+bzr20110929-0ubuntu5 Let me know if I can get the developers extra debugging info. ** Attachment added: "Schermafdruk op 2011-10-19 16:36:47.png" https://bugs.launchpad.net/unity/+bug/831466/+attachment/2560522/+files/Schermafdruk%20op%202011-10-19%2016%3A36%3A47.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/831466 Title: dash sumetimes runs below windows To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/831466/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs