To reproduce

Home > My Videos > play video > while video is running press the back/exit button on the remote

The video carries on playing but the gui freezes. if in windowed mode you can see the window name update. MP exits using the green power button normally.

h4. Additional Information
i can confirm this behaviour

can be found in the forum here

http://nolanparty.com/mediaportal.sourceforge.net/phpBB2/viewtopic.php?t=12758