It does act funky occasionally. I tried recording the series 30 Rock and it told me that there was a scheduling conflict when there was none. The next day, it took the record-series command with no problem.
Last night, it decided to record the Cowboys-Redskins game on it's own out of nowhere (I wasn't even watching the game). When I cancelled the recording, it began recording the event again. This happened over and over again until I gave up. At 9PM when there was a scheduled recording on HBO, it stopped recording the game. It was quite strange actually. Looks like it needs another power-on reset.