There seems to be something strange happening with my mouse. For some reason stuff isn't recognizing when the mouse is moving. For example, the cursor doesn't turn into a hand when the mouse is over a link in the browser, menu options don't highlight when you hover over them, and the dock doesn't magnify when hovering over it. However, if the mouse button is down, everything works fine. If I drag stuff around the dock, it magnifies properly, etc. Whats even stranger is it seems to come and go, without even restarting or logging in or out. Its been happening for a few weeks now and I can't figure out whats causing it, just wondering if anyone else has had something similar happen. Here is a movie of what it looks like when i try to hover over the dock, first without the mouse down, then dragging something around.
http://www.brianweb.net/misc/DockProblem.mov
http://www.brianweb.net/misc/DockProblem.mov