With the changeover to vBulletin 3.0, the formatting became unfriendly to some browsers with limited/substandard capabilities. I had been using iCab for years (not the best browser overall but until vB 3.0 an excellent one for browsing this board) and with the coming of vB 3.0 I’d pages sort of as you describe them: Colorless pages with the raw text of people’s posts, not even the usernames showing, all buttons gone.
Sometimes about halfway down, the posts would repeat themselves, this time with the purple bars between posts and usernames and buttons and so on. Sometimes, I’d get completely blank white pages with no text whatsoever.
(I switched to a different browser).
I know nothing of webTV, but I gather that it has its own proprietary browser? Anyway, the built-in browser may be incompatible with vBulletin 3.0 just as iCab is.