I have a suggestion. It looks like most of our problems is 2'nd related software. Please all that have problems do this.. if you have the time:
Backup your phone, reset it.
Now see if you manage to provoke the problem again. If not, the problems prolly are related to 2'nd related software. Of course now you dont have any contacts etc, but it seams like problems with contacts etc is much related to AppForgeBooster etc.
It would be nice to know if you still have problems with a phone that dont have 2'nd related software.
Tommen