I currently don't have the horizontal green and magenta bars that travel from bottom to top on the screen while using up-conversion. Since this component costs ~$1000 street, I'm concerned with future problems. After going through run around for 1 1/2 hours on the phone with Denon, I received information that made me less than happy. All previous models have the bug and new models that have been upgraded, have a dot on the back by the serial number. The way it was explained to me is that when the up-conversion circuit is used, there can be a 'conflict' between the Denon's component video's output voltage and the television's component video's input voltage. So in other words, while I don't have the problem now with my current television, I could have the problem if I change televisions. I am definitely not happy with this as the upgrade is very simple, but the time to perform it will be weeks. I was told that having the conflict is very rare, being there's only one or two complaints per week. I'm in a dilemma as to send it in for a very "inconvenient and timely" bug upgrade or to live without the upgrade and hope I'll never be affected. I was verbally told, which means that they may not stand behind this technician's "words", that even after the warranty period, if the problem arises, it will be fixed free of charge. I thought maybe it would help to compile a list of televisions, that are and are NOT affected by this bug. Maybe it would be good to also include the month it was received, to add even more information. Let me start. I do NOT have the problem. I am using a JVC AV36D302 television. I received my receiver in late November. Unfortunately, the units do not display the month they were manufactured. Also talked to Tweeter. They have had absolutely no complaints but are willing to do the upgrade. They say they have sold a ton and I'm the only one to even mention this problem. Talked to a competeing dealer in the suburbs, and once again, I'm the only one who mentioned a problem. Both dealers state that they have not had one 3803 returned and absolutely no complaints on the upconversion. Both were very willing to do the upgrade but stated they think it's unnecessary being they've had no complaints or any returns of the AVR-3803. Here's hoping this is a rare conflict.