Yes, we've had a few similar incidents like that in the UK, but now they seem to have stopped. No one is sure why, but I agree it's an expensive breakage. I've done a T-piece and a bottom plate, but since fitting new ones I've had no problems, despite what seem like worse collisions!
@Vicko - We only have one driver (of about 6 at National level) left on the Corally front end. The car is much easier to set up, and drives better, with the Assoc front end, in our opinion. It seems a shame, but when you consider that the CEFX front end (same design, different execution) has also been swapped out for an Assoc. front end, and that there is no known car with that design (semi-trailing wishbones) used anywhere else in full-size or model racing, one has to ask why Corally went for it.
I don't think it is any co-incidence that David Spashett's car (with the Assoc. front end) was so much faster at the Worlds in Italy than the other Corally cars using the standard front suspension. HTH