It's not a problem I've had on other cars though. With my 504 I drove that thing through mud and massive water splashes and it never had any problem...... I have a rather fantastic picture of my 504 with all headlights blazing kicking up a nice big wall of water:yeahthat:
And for those folks with discs all round, I'd say the rears could be even worse in this regard.
If I ever got to design a proper eco car, I'd specify drums all round, for this precise reason.