I have noticed when on my 8830 and a call waiting rings through, the caller ID of the call waiting call stay on the screen even after that call is terminated!!!!
In addition there has been situations where one of the calls on hold will never disconnect!!

Anyone else have these problem/s???

Upgrade to the latest OS if you haven't done so already.

i have the same problem even after upgrading to the lastest OS. I'd like to know when RIM is going to fix this problem...it's a PITA.