Currently Being ModeratedOct 9, 2012 5:04 PM (in response to Rockodan)
If you have made Quicktime fullscreen, you can reverse this by clicking in the upper right corner of that black screen. You will see a blue box with opposing diagonal arrows. Click that and Quicktime will revert back to a normal sized window.
If you are using the VLC movie player, they thoughtfully placed the full-screen toggle button on the player control bar.
Currently Being ModeratedOct 9, 2012 8:34 PM (in response to VikingOSX)
Unfortunately there is nothing other than the black screen and a cursor, slides on the Magic Mouse does nothing, there is no menu bars from the movie players, no nothing blue shrink button, just blackness.