Any vBulletin pros around here?

[juppy]

I don't know if this would be the right forum for this, so if not, feel free to move it where it goes.
The question is this: Another forum I'm a member of uses vBulletin for their forum software. Here lately though we're getting, for lack of a better description, double pages. It's like this...imagine a thread loading the question and all the replies and at the bottom below the quick reply box would be the bottom of the page, right? Well, on this forum you're only halfway down the page at that time because below the quick reply box, it starts in with the same part of the page that's at the top...like somebody just copied and pasted it right below the original. Same info and everything.
The admin contacted the vBulletin people and they told him it was a problem with his host server, not their proggie. So he contacted the host server people and, you guessed it, they told him it was a problem with vBulletin! Anybody know where the problem lies or how to fix it?

[juppy]

Wow, I finally found something nobody has a clue about!

Drisley? Anybody? Going once...going twice...