Pedro, I have a standard 64-bit installation of the Unity Desktop, with desktop effects enabled. I have not installed the compiz effects manager. I've added launchers to the panel, including chromium, terminal server client, and "gksudo wireshark". hessb@monterey:~$ dpkg -l unity* | grep ii ii unity 3.8.16-0ubuntu1~natty1 Interface designed for efficiency of space and interaction. ii unity-asset-pool 0.8.20-0ubuntu2 Unity Assets Pool ii unity-common 3.8.16-0ubuntu1~natty1 Common files for the Unity interface. ii unity-place-applications 0.2.46-0ubuntu3.1 Application place for unity ii unity-place-files 0.5.46-0ubuntu5.1 File place for unity hessb@monterey:~$ I have not been able to reproduce the problem. The problem has occurred on two separate occasions, restarting the laptop fixed it both times. In both cases the laptop was connected to a second monitor, running a higher resolution than that provided by the laptop. The laptop is 1366x768, the other monitors were 1920x1200 and 1600x1200. Note that the limitation geometry of the windows opening when the problem occurred, is similar to an effect I see when using the laptop monitor with another monitor with a higher resolution. I keep the bottom of both monitors on the same line, with the effect the lower resolution monitor has a large dead zone above it when viewed in the Workspace Switcher. If I try to move an app from the larger monitor to the smaller monitor, I have to drag it so the top of the window is below the top of the smaller monitors desktop. When the problem occurs, it is almost as if the bottom of the open window is locked by a hidden geometry of another desktop. Brian On Fri, Jul 15, 2011 at 11:08 AM, Pedro Villavicencio