Yeah, we had a major hardware crash about 2 and a half years ago, and that was one that didn't make the cut when we rebuilt the site in vBulletin.
Feel free to use this forum to test your sigs, etc. If you end up having technical issues with a sig, you can also ask in the UO Tech forum, below this one.
Note also that we also have the ability to load attachments into this software, using the "Advanced" form of posting, that can be deleted from the User CP, if you use up all your attachment space.
Oh, if you can positively identify yourself to our Managing Editor (Petra Fyde), and can find your old "imported_(account name here)" forum ID, she can merge it and your new one for start date and total posts.