I just got a MS high-def component cable to connect my xbox to my panasonic TH-42PHW5 plasma, throught the PT600 tuner Well, both 480p and 1080i signals work perfectly but I simply can't get 720p to display! I see a screwed up picture for a fraction of a second and then everything goes blank. (same symptom for 720p games or any other xbox app (xbmp, etc ...). My question is, has anybody successfully run a 720p feed through the tuner ?? I cannot believe the tuner doesn't support it ... What else could be the problem here ?!