When I was on the 2.2 firmware, I have jailbroken my iPhone. I installed the MbileInstallation patch. I had problems using "illegal" apps and original bought apps! I couldn't update my bought (or free) iTunes apps. I had to remove them on both iPhone and iTunes, losing my settings and reinstall the original (updated) version. Is still a problem with the MobileInstallation 2.2.1 firmware hack? And what is there else to do to fix this problem!?