So I've been an Apple guy since our Mac 512K a zillion years ago, and I've never had any problems with an Apple mouse until the last two. A wireless gave up the ghost after about a year, and now a corded one stopped scrolling correctly after only 6 months. I just went to Walgreens and got a $7 Verbatim and it's working fine. Just venting a bit. A $40 mouse should hold up to regular use for more than 6 months, doncha' think!