A while ago my mouse started offsetting while in the Start Menu. Everywhere it is fine and points exactly where it should. Click on the start button and open up the start menu then it is offset. Not all the time though. Most times it is normal but when it does offset the only way to correct it is to reboot.
Have not found anything via google search that specifically mentions this or how to correct it. It is a pain though and at first I thought the start menu was not functioning