"same problem here with the freezing

can move the mouse but the buttons wont do anything except within a web page
i can use left button to highlight text but thats it, it varies in its
frequency, rebooting about once an hour roughly but can be just a few
minutes and i cant replicate it but can kind of guess when its happened
because my mouse pointer seems to jump to the other side of the screen."

#41 at http://ubuntuforums.org/showthread.php?t=412125&page=5