Tis but a scratch!
I gotta ripple or two right here:
After a week of consternation, I built it up, rode it a couple of hundred miles, rinko'ed it, shipped it back east and did 250 miles of credit card touring on it on my recent Tour de French Fender Day. Rode it on gravel too.
Check the inside of the down tube as other's have suggested, if you don't see any cracks or signs of welding, build the damn thing up and ride it, and I'll see you at Eroica in the spring!