I had a similar problem a while back. Not sure if your problem is exactly the same. Mine seamed to start after using the ipad app to schedule season passes. Take a look at this thread my solution is at the top of the second page.
http://www.tivocommunity.com/tivo-vb/showthread.php?t=465361&highlight=bdspilot
http://www.tivocommunity.com/tivo-vb/showthread.php?t=465361&highlight=bdspilot