Perhaps you are not familiar with the terminology... In most of the world, "libertarian" means libertarian socialism. The historically correct meaning. Some right-wingers in 1950's US appropriated the term to mean extreme capitalism. Discussed earlier:
The usual claims against communism don't apply, as libertarian socialists historically opposed both communism and capitalism. (In the senses you mean.)
I'm sorry, you're correct, I should have linked to the HN discussion, where steveklabnik does a good job explaining. I was very distracted and rushed when posting.
(http://raganwald.posterous.com/hello-my-name-is-reginald-and...)
The usual claims against communism don't apply, as libertarian socialists historically opposed both communism and capitalism. (In the senses you mean.)