Xcode iOS organizer submit to app store yields “The archive is invalid” error

Question

I just switched from Xcode 3 to 4. When I attempt to upload an app that I have archived to the organizer, I receive this error:

The archive is invalid

Answer 1

I solved this same problem by deleting all of the expired signing certificates from my Keychain. Xcode seems to just grab the first one it finds with the given name, regardless of whether it's still valid.