(after edit conflict with User:Jason Potter - The WP:3RR suggests that the 4th revert is the one not allowed, but also mentions that it is the spirit of the policy, rather than the exact letter, that is enforced. With regards to the section of this talk page Ymous quoted, I did not miss that part. I also did not miss the sentence directly after it, which states "This "Discussion" page is only for discussion on how to improve the Wikipedia article."
In other words, the section quoted relates directly to the talk page, not the article.