I do tech support for blackberry/pda devices and when you get errors like that you may want to think of updating the OS system on the pearl. Even if you already have the most recent software reinstall it. Once you've done that, it should take care of the problem. I had the same issue on my pearl when i first got it and after updating the OS, never had the problem again.
PS don't forget to do a backup and restore or you're gonna loose all your information.