So I finally got sick of this bug, and with no word of a patch in sight for BB, I took matters into my own hands. I replaced the Phone and PhoneConfig apk with what was contained in Simply Stunning and everything works for me now.
For anyone that wants to attempt this, please post your results. I haven't had time to test that much, but it appears to work.
Download phone2.zip from Sendspace.com - send big files the easy way
Download this zip file. It is _not_ an update zip, so don't try to apply with clockwork. Extract the contents to the sdcard on your phone and using root explorer, move the two files to /system/app. Or if you're really clever, use adb push to get them to your phone. I rebooted just to make sure the changes took, and then everything appeared ok.
Let me know your findings