I am perplexed by a behaviour I am getting in the GameKit sandbox.
It worked very nicely in joining two devices (an iPhone and an iPad) some weeks ago, and those devices still work with one another smoothly.
I have tried to add a new friend on a third device, but only one account (the account which accepted the friend request) recognizes the other account as a friend.
On the non-recognizing device, there is a hint of recognition: on the 'sandbox' page, the flag graphic displays 0 friends, pauses, and then changes to 1 friend. But on the 'friends' page -- no friends.
Has anyone else seen a similar behaviour?