My tivo was set up against port 80 and it also ran out of data last week. Mine was connected via my network and had been running well for over a year, but last week it would connect, set the time but no data seemed to be imported. Forcing a manual phone call didn't help the guide data situation.

The tivo was set up against the Saturn analogue cable service (it was actually a free to air tivo, with most of the channels switched off, with an external VCR).

Unfortunately, I can't give any logs as I decided to re-image the tivo with the latest image last night to get around the problem (I now have a new problem with the guide data having duplicates, but I'll go over that in another post).