Was there a problem with the system on the 19th and 21st? I didn't receive notifications for two separate threads on those days.
I was hoping there would be an explanation. Missing notifications, by itself, would not be a big problem but the threads didn't come up in New Posts either. I'd hate to think people thought I had ignored their posts. Very strange. Perhaps gremlins at work.
Just encountered another instance of this. The problem may be due to the moderation of a post and the resulting delay in it being added to a thread. Is this possible?