I'm using XCode 4.4.1 to create an IPA file for TestFlight AdHoc Distribution. If I go through the Organizer to create the IPA file, everything works great and TestFlight just works.
Here's the problem. If instead of using the Organizer to create the IPA, I allow TestFlight Co-Pilot to detect the new archive, I get a popup that TestFlight has noticed the new Archive, and I click the "Upload" button. But then, I get an error that the IPA file could not be created. The error appears to have something to do with signatures, but I'm using the same signatures as I do when creating the IPA though XCode's Organizer. Here's a screenshot of the actual error. Any ideas on what I might be doing wrong?