I have no idea what this is, but when I try to download or update an app, I keep getting the same message...this has never happen before from what I know of....but it's pissing me off big time.
Based on this thread and Apple's support forums, seems like it's not exactly an isolated problem (I'm suffering the same problem too). Almost certainly on the Apple end of things. Tried three times to download an app. Hope I don't wind up with a $3 bill