Well, some progress but not great. Trek says it's definitely cracked, and they need to cut the top tube off to determine if it's from an impact or not. The LBS manager is getting the impression that at this point they think the cause was an impact, and it looks like it won't be covered under warranty. They asked him for more information, and he told them I don't race, ride recreationally, have not crashed, etc.

Anyway, I can tell them right now to stop, and have the bike sent to Calfee for a repair. The LBS manager estimates the cost for them to repair it (with repainting) would be about $400. A new frame would be > $1000 after the discount.

If I authorize them to cut the top tube and they decide the cause was an impact, then the repair cost would be more, if it's repairable at all, since the whole tube will have been cut off.

I need to call him back with an answer.