Opposite for me, Same problem
Hey there,
I just picked up a new MB last night and have seen the same behavior. I think it is caused by letting another finger touch the trackpad thus making the computer think it is doing a two finger gesture. The only way to fix this state is to lift your finger and reset the trackpad.
What do you think?
I used to be having the same issue, but it was very intermittent, so we brought it in to the apple store and they could not try to get it to mess up so they could fix it, and it never happened again. Until now. I am having the same issue, but resetting the trackpad isn't working. Do you think it could do with heat, and if my hands are cold? Or is the new trackpad STILL not heat sensitive? Also, I sometimes have absolutely no problem, but it is really jerky. I have the latest updates, and actually currently becoming a genius, which means I have access to the service support site, where I downloaded the MacBook Aluminum (Late 2008) Manual, and in my case, following the steps there, I need to replace the logic board.

I don't know if that is possible in the new MacBook (it isn't in the MacBook air, I'll tell you that!).
But the trackpad is clean, the computer is in a good %40-45 Humidity, and a premium operating temperature, and my hands are scrubbed to the limit. It works, then it starts getting jerky, then having one finger on the trackpad, it thinks I have four. Lifting off and resetting does nothing.


HELP!!!!!!!!!
I am currently forced to use an external mouse which is getting on my nerves. Maybe I could just ask apple to replace my Trackpad, reinstall the trackpad software, then replace my keyboard for a squeaky period key. But in the end, They may have to replace the top case, and if not the logic board, where as they might as well just give me a new computer!

Hopefully they will migrate my apps and data over. RRRRGGGG
But as odly as it seems, if I DO put my thumb down where the original button used to be, iy works fine just a little jerky. I REALLY don't like having to keep my thumb down. This is so frustrating that I actually made an account here.