I have the same problem. I bought new Xbox 360 last november and have been having this problem since day 1. I'm not sure if it will get worse but once it's up it's working great. I'm afraid to send it for warranty in fear of getting an older system or getting a worse system then the one I currently have (heard bad stories about replacements ;-P ). I tried different power supply, different cabling, different TVs so the only thing left is the console itself. Has anyone found a solution yet other than sending it for warranty? :-)