When you say "unity 2d app preview pane" you mean the Window switcher that can be toggled from the launcher and using Super+S, right?
Also can you please update to latest precise and check if the problem is still there? ** Changed in: unity-2d Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/920420 Title: unity 2d app preview pane not filling screen space To manage notifications about this bug go to: https://bugs.launchpad.net/unity-2d/+bug/920420/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs