Originally Posted by
1 2 MaNy Trust me guy, it was an issue on mine and its worth a shot. I had a similar problem about 3 months ago. I got a replacement through TEP and the trackball on it kept hanging up really bad so it took it apart and noticed that one of the prongs on the ring was slightly bent. I then swapped the ring with the one in my other Curve and the trackball worked perfectly after that.
I'm not saying that's definitely 100% the case here. I'm just saying that this worked for me when the brand new trackball on my replacement didn't function correctly.
Oh BTW.....if the prongs on the ring are bent or broken, then the trackball housing will jiggle around in there slightly causing your trackball to hang up. :)