If you maximize windows media center in a multi-monitor environment on one of the monitors (Slave monitor), you cant move the mouse to the other monitor. I am guessing that this is just a bug, otherwise it is truly an illogical design choice as Mr. Spock would have told you :-)

Pressing the Windows Key or pressfing alt + tab will enable you to move the mouse on any enabled display.

thanks for the suggestion...it doesnt provide a viable solution to the problem. Maximizing windows media player practically locks the rest of the windows. I applied your suggestion and the result is even more wierd. Here is what happens, by clicking the windows key or alt+tab, I am able to move the mouse to the main display. However, as soon as I click something on the main display the mouse is snapped back to the secondary display (where I have media center). This is definetely a bug I beleive.

Hmmm, my mouse doesn't snap back. I can use windows on the monitor not running Media Center while Media Center is playing.