Someone's not happy with the comments feature at PLoS One. At Sandwalk, blogger Larry Moran tells of his failed attempt to post a comment on the website. He's gotten several comments of his own to his post, one of them praising the comments feature as being the best thing about PLoS, despite the need for the web site to fix this bug. "The comments feature is probably the most important thing PLoS One offers, although the activation energy for participation is turning out to be surprisingly high," a reader posts.