I’m using the TWSignedRequest class (from https://github.com/seancook/TWiOS5ReverseAuthExample which is similar to the implementation found here: https://dev.twitter.com/docs/ios/using-reverse-auth) and everything is working well. Except for one issue:
on iPhone 5, I get an error 89 (Error processing your OAuth request: invalid signature or token). The same code on iPhone 4S is working (both are running with iOS 6).
Is this a known issue? It seems like the TWRequest on iPhone5 does not include the oauth_token in the OAuth header field.