SNR of 35/36 (or higher) is above the "sweet spot" of 31/32. It may be enough to cause problems. Cableco's are famous for just increasing the signal strength rather than fine-tuning it to the ideal. I'd have another go with the cable guy again...and this time ask for someone that understands cable cards and TiVo. If it was good for a while, something is changing to cause problems. It may well be that something is wrong with TiVo but until everything is right from the cable company, that will be hard to determine. If you have a TiVo case number, keep it open and if you can't get satisfaction from the cableco ask TiVo for a three-way call so you, the cableco and TiVo can all be on the line at the same time. Hang in there...it can work! With four-million + subscriptions I guess there will be some problems and it's too bad that you (or anyone) has to go through these sorts of things. You have my sympathy and I wouldn't blame you if you bailed, but it might be worth another look.