Dear Readers: Rolando has emailed to tell me that the comments are not showing for him here in the past several days. That is, he can read postings, but cannot see comments even when comments have been made in response to a posting.
The same thing has been happening to me. I have asked for assistance from Disqus, since this seems to be a Disqus bug — and am still waiting for a response. In the meantime, I've found that deleting my cache helped, but then the problem reappeared.
At that point, I tried shifting from the Safari browser I normally use when I'm online to Google Chrome, and the problem disappeared again — I could see and read comments. I'm assuming, then, that this problem my be a browser-specific Disqus interface problem. You may want to consider using a different browser if you're having problems seeing comments here.
Finally, I find that if I log into Disqus itself and go to the administration page for the blog, I can always see and respond to comments. Since you readers aren't administrators for the blog, you can't do that, of course. But I think that if you log into your own comments page and click on any previous comment you have made, that will enable you to see threads that you are not seeing when you go to the blog itself.
I'm very sorry this is happening. I appreciate Rolando telling me it was happening in his case. I have been trying to get some assistance from Disqus to deal with this problem, and will let you all know if I receive any information about how we can fix the problem.