I am pushing a frame into FS exclusive mode on Win32 - virtual screen config using the primary (default) GraphicsDevice. The fullscreen frame appears properly. When the FS frame is shown, I am pressing ALT + TAB the first time. Native menu appears showing the icons of all the open applications. I am choosing one of them and FS frame gets minimized. I am bring the FS frame to the front again. Now I am pressing ALT + TAB and moving the focus to a different icon and waiting there. The native menu disappears. Now When I release the keys, the FS frame gets minimized but still it stays on the screen and 'minimize' icon changes to something else. This happens only when you release the ALT + TAB keys after the native menu with icons disappear.

This is reproducible atleast since 1.4.2 only on WinXP-MultiMonitor configurations. Not reproducible on WinXP - single monitor.

Run the attached sample test. A frame would popup. Click 'Do FullScreen'. A fullscreen frame will appear. Follow the instructions given in the above description and check whether you are seeing a frame with changed 'minimize' icon on the top-right corner.

I have also attached a screenshot of the frame.