Mark, I apologize for not releasing your comments sooner. Because of problems with spam, we've had to make it more difficult for spambots to open threads and post comments. One of those measures entails the withholding of the first 3 comments any new poster makes (because somehow those spambots still manage to open accounts). Once the third comment is released, the commenters is free to post and his/her comments show up immediately.
Unfortunately, things can go wrong in popular threads, and I'm not home to immediately release the comments. Again, sorry for that. You should be able to comment unimpeded from now on.