The good news, however, is that burr86 says that he has managed to fix my problems with comments. It appears that although I immediately turned off the option in the new feature that had been identified as causing problems with receiving comments, it hadn't actually turned off - it was invisibly still on. But burr86 says he's fixed this manually for me.
So could I impose on you to just reply to this post, please, in order that I can check it.
Thank you kindly.
Cross-posted to ncis_gibbsducky