Ive cought mine a couple of times now, but only going down things, i try not to reverse over curbs. They do catch when coming down from a driveway etc. Mainly the fronts.
I found though, the rears dont fit too well, i dont like the design of the brackets.
In the kit for the front mudflaps you get 8 small clips, you only really need two on each mudflap.
SO the spare four i used and put two on each rear flap. One under the bumper, where the crew goes, as it doesnt fit perfect, with the clip it fits much better.
And the other at the very top of the mudflap, as the big brackets can't go riht to the top, so you tend to get a gap. So ive got one there too
They fit much better!