I was a very early adopter of TiVo my first standalone was activated in October 1999. Went through a number of standalone and DirecTiVo models. A few years ago, the Rupert Murdoch era at DirecTV forced me off TiVo and onto DirecTV's own DVR boxes. Recently, the dispute between DirecTV and Comcast over Versus prompted me to get Comcast installed, buy a new TiVo HD, and insert a Comcast M-Card (so now, for the time being, I have both Comcast and DirecTV). In the course of fiddling with my new TiVo HD toy, I discovered a few puzzling aspects of TiVo's implementation of HDCP over HDMI. 1. I noticed (using a status screen on my A/V pre-pro) that the TiVo HD asserts HDCP on all channels even OTA channels, as well as every single Comcast channel, copy-protected or not. I confirmed this with a "support article" that I found on TiVo's Web site, in which it states that the (now-discontinued) original Series3 asserts HDCP on copy-protected channels only, whereas the newer TiVo HD models assert HDCP on all digital channels. See: http://support.tivo.com/app/answers/detail/a_id/146 Why? Anybody "have a clue"? For comparison, my DirecTV DVRs work like the original Series3 they do not assert HDCP on OTA channels or on any non-copy-protected satellite channels. Not even on premium channels like HBO. Only PPV channels are ever HDCP-protected by the DirecTV DVRs. 2. An annoying (but solvable) issue that results from the TiVo's constant assertion of HDCP is that the "Viewing is Not Permitted" message can pop up if (for example) you have one TV connected via HDMI and another TV connected via component cables and you turn off the HDMI-connected TV set. (This can also happen if you switch the HDMI-connected TV to a non-HDMI input, but that depends on the TV set. Some models continue to support HDCP on the HDMI input when you are viewing another, non-HDMI input. Some don't.) The "Viewing is Not Permitted" message says that you must unplug the HDMI cable. Indeed, that (extremely inconvenient) solution works, and after the HDMI is unplugged, you can then view the TiVo successfully via component cables on the other TV. A better solution is a to install an HDMI splitter and run HDMI cables to both TV sets. Conjecture: This nuisance appears to result from the constant assertion of HDCP together with a (presumed) inability of the TiVo HD to disable its HDMI output jack internally (while leaving the component jacks active). That is, HDCP requires the TiVo to get an HDCP key from the TV set. Since the set is turned off, there is no HDCP key. So, to meet the HDCP standard, the TiVo must disable the HDMI output but the only way that the TiVo knows how to turn off HDMI is to make you unplug the HDMI cable! Anybody out there have a better explanation?