First off I haven't heard of that particular problem before, and the last poster's advice about reinstalling drivers sounds right.
I hope this doesn't sound like a cop-out, 'cos it's not meant to be, but you could be chasing this for more time than it's worth. A new optical mouse can make the world of difference to your enjoyment of your PC. I have tried plenty of cheap mice and they drove me nuts.
Personally I find Microsoft mice the best. I have the one with an extra button each side, and you can set the extra buttons to do whatever you feel like. I've set them as Copy and Paste 'cos I do a lot of that. You can set them do to Browser Back button or anything. If you do get another mouse, install the driver on the CD that comes with it.