Even with that bug, it comes up very rarely (i seem to recall hearing 3% of games). At goldtoken, if that happens in one of your games, you can message Chad and he will put it back and ask the player performing the illegal move to move again. I guess that depends if Fencer is willing to fix these games manually, or if he would rather have the server do it :-)
IYT doesnt have this particular bug, it will be fixed at GT (we have only waited hmmmm how long now lol) I always consider with a game like backgammon, or chess for that instance which has particular rules, then they should be implemented correctly after all these games have been around for thousands of years.
So there should be no draws, no illegal moves, and a game friendly rating system (ie FIBS). So far BK is down on all 3 points, its only a matter of time to see if Fencer chooses to implement them or if the people who wish to play the more serious gammons move on elsewhere. Y'know everyone keeps asking for more games but how about getting the ones we have right first...Just my opinion :-)