well it's good that your cautious about changing your settings-- because you can damage your monitor (tv) if you put something too extreme in the settings.
it definitly sounds like a driver issue... although it's possible (i don't know for sure tho) that X can be configured for this.
yes your correct about me meaning that your X and drivers, need to be up to date.. i mean, it wouldn't hurt (unless someone tells you otherwise).
i'd look into the tv manufactures specs too (on their web site maybe) and see what they say about doing this.
maybe they have some special drivers.
also review X's info on this (i'm sorry, i'm not versed with using 64" tv as monitors in X).
and just for the heck of it pop in a livecd of some kind.. knoppix probably won't help on this...except maybe MythKnoppix might.
and also try some other multimedia centric one like suse, mandy, or better yet look on
http://www.distrowatch.org for a list of specialized os's for multimedia..and just try some to see if any of them help.
again, sorry for the 1/2 arsed ideas.. but hey, i gotta earn my keep here somehow!!
anyway good to hear you haven't 'fallin into the screen' yet or gave it a bloody beating
