I know a very successful cob that has these! Owner was not too impressed when my farrier pointed it out (didn't like to think her baby wasn't perfect!!) but once he had tackled the problem, you could hardly notice unless you knew it was there, so have a word with your farrier, he should be able to help. This cob has won national Champ's too so there is hope!
Have a chat with your farrier, as a lot can be done cosmetically to throw the judges eye, fitting wide and unclipped gives the judge no centre line in which to see that the linb is off. I dont know and show horse with perfect conformation! But there are plenty of "tricks" to help! x