S03 Error Solution
I'm posting this in all the S03 threads I found, since it is so frustrating:
Through a LOT of trail and error, I've discovered increasing the swap space to 2000 or 2GB allows TiVo to connect to the TiVo Servers and process the large program guide data update. I don't know if you can do this on an existing disk--seems doubtful to me. I used WinMFS on a new disk and have had no problems since. On the same disk I had the trouble with smaller swap partitions, especially the default.