Here's a sample complaint from georgevargas:
Accessing the Internet works. The Trailers option flickers off when selected but if I am quick enough I can access it. The trailers will stutter, pause and lag. No access to the iTunes Store at all for movies, tv shows, or podcast. Youtube works without a problem. I unpluged the AppleTv twice, and restared it with the remote once. All is not well.
As of last night I had full acces to the iTunes Store. Since this morning I was getting an Itunes Store Not Available message, and after unplugging the AppleTv the iTunes Store access completly disappeared except for movie trailers.
Diagnostics, rebooting, and restoring the device has not helped users experiencing the issue.
MacRumors has also been able to confirm the problem with their own device.
At this point in time Apple has not addressed the matter; however, we'll let you know when it's resolved. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.
Read More [via MacRumors]