Mine turned out like this (3.6.2)
Attachment 55856
Initially I thought it could be vBSEO or other plugins I've installed that was causing the problems. But after I disable plugin globally via config.php, it became evident that it wasn't the case. I chose "Create New Style" with "No Parent Style" when importing, so it wasn't carrying anything over from my modified base vBulletin style.
I'm not sure what is the cause, but looking at the HTML, and passing it through validator, it seems to be complaining about bad placement of a few HTML elements. Does anyone have any idea what could be the cause?