The only issue I can remember was after pressing guide it got stuck displaying downloading data. You could exit easily from the guide screen though. The fix at the time (courtesy of Barry), was to do a freesat tune and not save the results. Presumably it corrects some duff data.
As I always use schedule/red I have no idea if the issue is still present.
Unfortunately all the post data from this period was lost when the prominent Humax forum at the time shut down, so it’s largely down to memory.