Actually, I know what the issue is for both of you guys. When we do a validation check before allowing File|Package we aren’t re-generating the plist file for use by the validation pass and so it reads an old out-dated file (or worse doesn’t even find one) and fails the validation. I am looking at a fix right now. If you want to get around this bug for now, go in to Engine/Intermediate/IOS and put the correct bundle identifier in the plist which resides there. If you don’t find a plist there, then check the ProjectDir/Intermediate/IOS directory for it. That should get you going until I can get this fix.
-Pete