I have had frequent issues for over a month now, with the rollerball on my Blackberry curve 8330 getting stuck. When it does this, I can not move upwards only scroll down my email lists, etc. The ball will only scroll down. I end up having to put a lot of pressure on the ball in order to finally get it to work correctly again..For a little while.. My husband had the same issue with his Blackberry tour and have to have his phone replaced. Has anyone else had this issue with the rollerball getting stuck, and if so, any ideas on how to fix the issue?