Some of you seem to think that my comments regarding Rovi/Macrovision are much ado about nothing, so I felt compelled to clarify my position. I had the "pleasure" of working with the engineering and management team at Rovi for just over 3 months, after I had complained to CBS management in NYC about the many issues I began having with TVGOS in October, 2008. At Macrovision's behest, I performed daily diagnostic routines on all of my v8 and v9 devices, provided them with detailed spreadsheets, worked in concert with the local CBS affiliate, as well as the chief engineer/headend manager for Comcast South Florida; I even tested one of their proprietary TVGOS tuners to try to find a solution to the problem (their STB was never able to find a host channel, BTW). At times, I found myself on the verge of losing my temper because I kept getting the impression that Rovi staff would never admit that there was a problem with their equipment and/or signal; in fact, on several occasions they condescendingly stated that "no one else" in my area was having problems with TVGOS. They even had me speak to the chief engineer at the Miami CBS affiliate, whom they had provided with a Kuro plasma that exhibited no problems with the TVGOS data stream. I tried 4 different antennas, and they had the cable company send out an engineer to test the signal levels at my residence. I finally gave up a few weeks ago when I realized that they were simply keeping me "busy" so I wouldn't complain to CBS NY anymore.
Just so some of you don't jump to any conclusions, let me give you the facts of my case: My Mitsubishi DLPs use both an antenna and a CableCard to obtain TVGOS data; my Sony LCD uses either an antenna or a direct cable feed. The Mitsus are v8 and the Sony is v9; all devices have always had the latest available firmware updates running. Since October, 2008, the Mitsus began losing the listings gradually over a period of a few weeks until all of the cells showed NO LISTINGS, then the grid would go away and the TVs would start looking for a host channel. When I first got the Sony in January, it worked normally as far as TVGOS is concerned, then began doing the same thing as the Mitsus after a few weeks. In February, I noticed that the Mitsus were exhibiting a new problem: they would reset themselves at random, whether they were on or off, while searching for a host channel. I later was able to determine that this was being caused by a change in the manner in which the NBC affiliates were broadcasting their signals. This of course added to the issues with TVGOS, completely wiping out any guide data that was collected before the reset. "Deleting" the offending channels from the TV's channel memory only helped to a certain degree, as I've never been able to retain TVGOS listings for more than a couple of weeks at a time if at all.
This much has been established through the various tests on the Mitsubishi DLPs and the Sony LCD: something in the TVGOS data stream causes the Mitsus to "forget" the host channel periodically, resulting in the loss of guide and forcing the sets to start looking for a new host channel. The Sony will keep the guide for a longer period of time, but I suspect that is only because it only loads the "daily" version of TVGOS in the first place. But it too occasionally loses the guide and has to start the search process all over again. The loss of TVGOS has impacted my use of the Mitsus greatly, as I no longer can reliably schedule FireWire recordings, set up up program reminders, or save my favorite CableCard-tuned channels in the TV's memory. I purchased the models I did specifically because of the TVGOS features and functionality they offered, and since my research and past experiences had verified availability of TVGOS from multiple sources in the Miami/Palm Beach markets I feel I have a reasonable expectation that the feature would work. It did when I first purchased the equipment, and to this date neither manufacturer has stated verbally or in writing that it has ceased to do so. I too have read the so-called disclaimer, and until somebody at Rovi/Macrovision grows a pair and puts out a public statement attesting to the fact that TVGOS can no longer be expected to function with existing devices in certain markets where the service is still available I will continue to accuse them of unfair business practices. In the meantime, I've disabled TVGOS on all of my equipment, and sincerely hope that their new guide system is a complete failure.