title: When Java fullscreen exclusive mode isn't?
body: <p>I am working on an application in fullscreen exclusive mode; in general, this works just fine. On some computers, however, the window is not actually going fullscreen. </p>
  
  <p>All computers are running identical code on Java 6, u45 with Windows 7, 32-bit. On two of them, the app goes fullscreen with no titlebar, no taskbar, etc. and gains keyboard focus. On two other machines, the window, with decorations, enlarges to the size of the screen, does not get keyboard focus, and sometimes minimizes and then maximizes again repeatedly. There are no other processes stealing focus (that I can see), and the computers all have the same processes and services running on them. Also, <code>isFullScreenSupported()</code> is returning <code>true</code> on all machines.</p>
  
  <p>Any help on this would be helpful; if there are any mysterious processes that might be stealing focus or preventing fullscreen mode, I would love to know what they are.</p>