There’s been some behind-the-scenes tweaking of the ScienceBlogs framework, which has caused some problems with commenting on other blogs (along with some other embarassing glitches, involving posts being blocked by spam filters, and fun stuff like that). I haven’t heard any complaints here, but it’s entirely possible that people have had comments blocked, and just given up in despair.
So, if you’ve had comments blocked by the system, please drop me a line (orzelc at steelypips dot org) and let me know. And if you’ve noticed anything else wrong with the site, this would be a good place to leave a comment.