I just broke the frame of my Trek 4300. The crack is on the chainstay about 3 inches from where the seat tube and chainstay meet. The break is completely through the frame. I can't believe this..I was just riding on the bike path (paved), went over a bump where a tree root has lifted the trail up a few inches (it was less of a "jump" then going down off a road curb!!) and all of the sudden I realized my rear was wobbling. To my knowledge there was no crack prior to this incident.
Anybody ever dealt with Trek in a similar situation? I couldn't find my manual but I think the bike is only covered under warranty for a year. I've had mine about 2 years. I haven't called the bike shop yet, but I doubt if they'll be able/willing to do much.

I just thought I'd vent a little bit.

peace,

Gabe