I was having this warning when submitting my app with Application Loader.
The app references non-public selector in MyApp : id
This warning can potentially reject my app from Apple AppStore's validation.
My app is using Facebook SDK iOS 3.1.1 (also tried with 3.1)
This problem happens because of the Facebook SDK for iOS.
Application Loader forbids the use of the variable "id" from any FBGraphUser related class (maybe others variables too, didn't test) - e.g. :
id<FBGraphUser> friend
id<FBGraphUserExtraFields>user
Facebook is informed about this problem as of january 2013 : Bug Report
The workaround for the moment is to use these:
[user objectForKey:@"id"]
[friend objectForKey:@"id"]
instead of user.id
and friend.id
as shown in the different Facebook samples.