It depends on the move... but a 100% method is just to open e.g. a Notepad window on top of the player, then move the Notepad window to expose most (but not all) of the player.

How did you do that ? I can't reproduce.

Moving the non-skinned app window can leave the text areas of the player showing solid black:

[url=http://img170.imageshack.us/my.php?image=playertextblackedoutmx5.gif][img]http://img170.imageshack.us/img170/1495/playertextblackedoutmx5.th.gif[/img][/url]

EDIT: this seems related to: http://www.mediamonkey.com/forum/viewtopic.php?f=6&t=28791&p=146173#p146173

EDIT: Not reproduced in 1304.