Hmm, maybe a vBulletin bug with American DST then. I now suspect that since it's Sunday here, vB "thinks" that the server clock has been updated for DST and is therefore overcorrecting by an hour. If my guess is correct then it'll fix itself once the US actually switches properly.
I remember some similar issues happening some time ago but in that case the time was wrong for weeks on end. That was fixed with a vB update a few years ago. This looks like a different issue and with any luck it'll only be a problem for one day.
