Thought I would let everyone with 3.0.1 3gs that they can upgrade with the custom ipsw creator pawnage and use 3.1. Mine upgrade works fine but I have no carrier ID displayed. That was corrected by Makeitmine from Cydia.

I am getting some apps that close by themselves though with no reason as others work OK.

Many thanks to the Devteam for this, it is greatly appreciated.