I've noticed as the day goes on that the comments feature appears not to be working here today. When I go to Disqus, the site that manages comments for this and many other blogs, I find that site seems not to be working properly.
So I'm assuming that, whatever the problem is, it's with Disqus and is system-wide for Disqus, and not just confined to my blog. I apologize for the inconvenience, and appreciate your patience as this bug gets dealt with (as I hope it will) soon. I had tried some time earlier today to acknowledge and reply to previous comments here from the past few days, and haven't had success doing so for the reasons mentioned above.