GRRM’s official site has been updated with news in his “Not a Blog” that he has completed a Bran chapter that has been giving him trouble for six years. Normally completion of a chapter would go unremarked, but the Bran chapter was exceptionally difficult for him. In the comments he also discusses his drafting process, his ideal of not publishing the series until all the books were written, and a small hint about whether anyone would find the chapter surprising or not.