Since it was on 06 was their a previous owner? Looking at your pics it does look a little worse for wear but that could just be the pictures or those acorn nuts on the idler standing out in the last pic The side pic makes it look like there was rust on the interior of the frame? or is that just clay or something. Just curiousity I guess I've had bikes and their parts snap on me before and so far never had a problem with warrantee but always tried to figure out how it broke to prevent it next time.

Did you notice it riding funny and stop to look or did it just dump you to the curb?

On the rans web site it states
"Increased warranty: All parts excluding the frame (which is lifetime) are now covered for 12 months. This is retro active to bikes purchased within the last 12 months"

Not to sure how to legaleze read this but it might be that the frame was always lifetime, or is now lifetime.. It may be worth checking. http://www.ransbikes.com/Warranty.htm