Was it me? 
ETA:
AFAIK, this is only for Series 3 and above. I have found no such settings on my S2 ST.
http://www.tivocommunity.com/tivo-vb/showthread.php?p=8560418#post8560418
ETA:
AFAIK, this is only for Series 3 and above. I have found no such settings on my S2 ST.