It is not device based. If you read the 9 preceeding pages, you will see that, but I can tell you so from my own experience with my iPhone 5, iPad 2, and iPad Mini, all of which have experienced the problem in one form or another.
It also has nothing to do with apps requiring a particular OS. I just sent a trouble report in to Apple and hope to get some kind of answer in the next day or two.
Meanwhile, I connected to iTunes and found my phone was recognized as usual, but when I looked at my account info, only 2 of my 4 iDevices were listed as registered to my Apple ID. However, of the two devices not listed, my iPad mini and my iPhone 5, only the iPhone 5 has the problem.
I'm done trying to figure it out. Will wait for it to go away, as it did previously.