My 3GS on iOS 4.1 is jailbroken with GP. Most of the popular Cydia apps run perfectly - SBS settings, Lockinfo etc. but 2 which don't run are APTbackup and Mobile Terminal. They download and install, but when tapped, their launch screen appears for a millisecond and then I go back to my homescreen. I thought that maybe they were not iOS4 compatible but on-line sources say they are. Can anyone tell me what is wrong? Thanks a lot! J