Hope I am posting this is the right place. I have a series2 Tivo DVR & Comcast with a Motorolla cable box. Just lately, when I go to change channels using my TIVO remote from the Tivo channel guide menu, the cable box will sometimes fail to go to the channel I select. I can see it's trying to connect to the channel initially but it usually lands on some other channel instead. If I try it with the up/down channel selection button then I can usually get the cable box to go to the channel I want after many attempts but it's frustrating. Also, Tivo is failing to auto-record my programs in some cases as it records a different channel instead. The program name is correct in the Now playing list but when I play it back it's clearly not the program it says it is. I am using serial cable & not an IR blaster. Is this a problem with my Comcast cable box or Tivo you think? In the past when I've had channel lineup problems (unrelated to this) Comcast has insisted it's Tivo & Tivo has insited its Comcast so I'm hesitant to ask for support until I can pin it down to one or the other.. Has anyone else had this problem & if so, how did you resolve it? I browsed the forums but didn't see any other posts about this particular problem. Thanks in advance for any advice..