Here's the deal:
1) The HUD is not widescreen. It is just stretched so no big deal - the actual picture is widescreen. This is very very common in games and likely no one would have noticed if not for issue #3 below.
2) Some people's displays don't correctly flag this game as 16:9. It happens and you might need to toggle the format on your display itself.
3) 480p in this game zooms slightly in both 16:9 and 4:3. Apparently Bungie has yet to figure this out for themselves but someone deffinitely coded it into the game. This is why some people report having the HUD cutoff in 480p widescreen. If you set the game to 480i widescreen the HUD is fine. What happened was that the game was designed for 480i widescreen and for some reason with the 480p zoom it moves the HUD into the overscaned areas on some sets (if it's set very low you won't have a problem but for a lot of factory defaults it will cut the HUD slightly). Why would 480p zoom? Probably a last minute performance thing (cut off 5% on all edges and you end up with 19% less video area to render). Unfortunately someone forgot about safe overscan and the HUD. This can be seen clearly at AVS forum (480p is cropped on all edges) where a member used an LCD front projector set at zero overscan. You can see the HUD moved out to the sides and you can clearly see the cutoff on both sides and top/bottom when comparing the 480p/480i shots. THere is zoom in 4:3 480p also so the zoom is only related to 480p settings.
Link is Here:
http://www.avsforum....20&pagenumber=61) Go down to the pictures posted by member 'bbobbo' these are taken from the projector with zero overscan
2) Note the placement of the HUD, note less info on all sides.
3) Read the ChrisFB conclusion below it.