So, this is strange: As of approximately half an hour ago (that I've noticed), the Expose hot-corners that I've assigned don't work (the shortcut keys do, however), the dock won't magnify when I mouseover and when I try to select options in contextual menus, I have to hold down the mouse-button to be able to select anything at all (and the highlight color doesn't move along with the cursor, if that makes any sense)... I can't think of a reason why this should be happening, but maybe someone else could help out. For reference, I was just watching a movie in VLC (one that didn't want to play in Quicktime <Error: Quicktime cannot play the file>) and this started when I was watching. The onscreen controls (fullscreen controls) in VLC also wouldn't fade out, as they normally do when you're not moving the cursor. I don't want to come across as panicky, which is why this post doesn't sound that way. But this has me feeling rather uneasy, I must admit. Thanks in advance for your help!