My N800's screen just started constantly rolling, like when old TVs had issues with the vertical hold adjustment (hopefully at least some of you are old enough to remember that!!!). The rolling screen image makes is fairly difficult to use! There's a noticable jitter to the screen image also. Has anyone experienced this type of behaviour? Any ideas as to how to fix it? The tablet is right around the 1-yr mark - I'll have to check if the warranty still applies... Appreciate any thougts you might have. Thanks, TJ