Hey-o,
Don't know if this will help you or not, but I was having this same problem on a bell touch pro, and the cab from the thread below fixed me up. The text of the thread implies that it's a problem specific to phones with Bell's custom UI, but I've got 4 of these in my contract, and not all were having the issue. At any rate, install at your own risk: although I can't vouch for the file's validity, I do know it fixed my problem.
http://forum.ppcgeeks.com/showthread.php?t=48243&page=2
good luck!