OK, I'll admit I haven't searched - I'm at work and don't have time.
My HR34 has been stuck since yesterday. Wife turned it on and it said it was downloading an update, never passed 0% and switched itself off! I did a reset when I arrived home and we were able to watch it last night, so I checked that the CCK was connecting and it was fine.
Fast forward to this morning and it's in the exact same state.
I know I can reset it and it'll be fine, but it's failing on a download (obviously!) somewhere.