Got IT!!!!!!!!!!!!!!!!!!!!!
Turns out the new version of MPC loads an overlay that DOESN'T support Screenshots as a default (And it says so in the options). Just pick a new overlay! (And restart).
Start MPC
Push O for options
Click Output (About halfway down).
Overay Mixer should be marked (With a * for no screenshots). Click Old Renderer (Which doesn't have a * )
Click OK
CLOSE MPC!!!! (Ok/Apply does not work here).
Start MPC with your favorite show.
Push F5 and start taking pictures to your hearts content. It puts it in My Documents BTW.
Have fun!
The key is closing MPC after changing the Overlay. Changing the Overlay during a show will still not allow Screenshots until you close the window.
Atleast that's what they said on some fora.
works! i had the same problem.