This just started. Readers of my blog are reporting that they cannot see comments. The Article says there are comments, but they don't appear. Other readers say that they only see old comments; for example, one today (March 5) said the comments they see were from February 28. HOWEVER, when someone makes a comment, the missing comments appear.
This sounds like a caching problem. I use the current version of WP Super Cache. I don't know of any WP Super Cache setting that would make this happen.
What have I changed? I don't know. Whenever a new plug in or new WP version comes out, I install it without much thought.