I'm getting this error via e-mail when trying to submit my app to the app store:
Invalid Code Signing Entitlements - Your application bundle's signature contains ubiquity code signing entitlements that are not supported.
Specifically, value "9P774KXXX.*" for key "com.apple.developer.ubiquity-kvstore-identifier" in My App Name is not supported.
I know this has something to do with iOS5/XCode 4.2, but I'm not using this - I opened the project once in XCode 4.2, and then I switched back to XCode 4.1 - so I guess there must be some leftovers in the code?