Some random thoughts from your replies:
The bike is (was) basically brand new. It's done under 3000ks since new.
Looked at the rear sprocket and rotor, and they didn't have grooves.
I bet that took a lot of strength for some of you to not say "I told you so"....
Pete - I was having a good talk to Jackie about the dangers of riding, and the friend that I lost recently from a bike crash. Showed how quickly things can change.
Ernie and Cracker - Jeez! I have heard so many similar stories of people coming off at relatively slow speeds, sustaining serious injuries or worse. Sliding and bouncing down the road in my jeans for probably 15 or 20 metres (or more) could have really ruined my day.
Nick - Ahh, so you're ClubCobra Nick! Yeah - the Cobra at least has a rollcage and race seats.
What I really have to do is find out how the insurance company can assure me that the cause of the accident has been rectified. I think I might take a couple of days to hang around the repairer's shop to make sure the gearbox comes out, and is stripped down in front of me. No point in having it all happen another 2000ks down the track.
Pending the outcome of the investigations, do you reckon the insurance company is going to have a fight with KTM, or do I need to do it myself?