I installed boot camp and XP last night, and I noticed today that while I'm in XP, the trackpad suddenly becomes erratic and sometimes even non-responsive. When I first boot up or restart it works fine for a few minutes. But then it sometimes stutters, moves too fast, or just gets stuck and doesn't move at all when I'm using the trackpad. Is this a known issue or am I just unlucky? Is there any kind of driver fix or update for this? Thanks in advance.