I figured you wouldn't go with abortion, which is why I was curious. I've had enough of hearing about how "You can't be a libertarian if you don't support the so-called right to choose" (To commit murder? Or is it only a "Choice" before birth. Why?)
Actually, on the "Race thing" you're talking about, Rand took it back under pressure. Ron said the same thing, but refused to take it back when asked. His point has absolutely nothing to do with supporting racism, but everything to do with the fact that it is an act of aggression to force a business to serve someone against their will. Ron Paul is completely right on the issue, and Rand was also until he retracted it. You shouldn't be able to use government force to force people into association with people for any reason (Whether race, sex, sexual orientation, or any other reason) against their will.
Not only is Ron Paul correct, but absolutely everyone with a legitimate claim to be a libertarian agrees with him.