man they must all do it, my D22 rear one broke off in the same way gonzo's did.
I've had too take off the front mudflaps on my D40 cause the big ass tyres scrubbed on them and i'm going to make some new ones.
Tip with making mudflaps is went you put the hole in them for mounting, cut a slit through too the edge of the mudflap, this create a week point so that if it does get court, it will pull out with out pulling off you guard or flare. we do this on the off-road truck so they don't damage their guards.