Many tvs have limiited codec decoding themsleves. I suggest u invest in a media player like WDTV ( apprx 5-6k ) and hook it up to your tv.. would be able to play all formats.. problem solved...
Exactly what I would recommend, and have done! In fact I really don't understand why TV makers are trying to do everything in the TV - it's sure to detract from the effort that should go into improving the core function of the TV - great display. Removing this half-baked player function from the TV would also reduce its cost, which one can then invest in a good media player that does *it's* job well.