I had problems while "archiving" my app. I think there are invalid profiles because of iPhone Update to 5.1 and XCode update to 4.2.2.
I've taken now more than 4 hours to get rid of certification issues while using this thread step by step 3 times (which costs a lot of time):
I still have the following fault:
No identities were available
An administrator must request identities before they can be downloaded.
The "Download identities" button went back to this window after processing some seconds.
Do you know how to get out of this wood of certification documentations and solve that fault?