Well, that certainly sounds like a flush! But doesn't the Guide start rebuilding almost immediately, going out a few hours, then a day, then.....? And what DVR?
HR 34. It does start rebuilding but takes quite a while before everything is back. I've noticed this now through several updates. It surprised me because I had never seen that behavior on long ago software. But one of the updates, I have no idea which one, caused this to essentially flush with one menu restart.