First, the Musicmatch problem. I have buttons on my keyboard for stop, forward, back, play/pause. Whenever I have Musicmatch Jukebox as my top window, hitting the back or forward button on my keyboard makes it skip back/forward 2 songs instead of only 1. However, when any other window is in front of it the keyboard buttons will make it go forward/back by only 1 as it should. Also I should mention, when I click the actual buttons on the player with my mouse everything always works fine.
Now onto my video playing problem, which is far more annoying. If I open a video on any player (Windows Media Player, Media Player Classic, VLC, DivX, RealPlayer, Quicktime) the sound works fine, but the video will not play. Now for the weird part; if I open a video, then open the same (or a different one) right after the first starts, the second will play just fine with sound and video and I just need to exit the first. Again this happens on any player, and with any file type.
This second problem first started after I installed a new video card (a Sapphire X1950 Pro) and updated to the newest version of Windows Media Player (though I've since gone back to version 10). At first I thought it was some problem with codecs since it seemed as if they simply wouldn't play, but then I stumbled across the trick to getting them to play so I really don't know what's going on now.