Thanks for the explanation, DaveRo.

While we're discussing Mudcat tech (with people who use "raw, naked html", no less!), I have another question:
Sometimes I want to link to a specific post in a Mudcat thread. To do this, I go to the top of the thread where it shows who has commented, and try to figure out which comment is the one I want, then click on it and – if it's the right one – I copy the URL in my browser's address bar. If it's not, I go back to the top and repeat the process until it takes me to the comment/message I want.

Is there a way to figure out what an individual message's URL is if I've scrolled down to it instead? I'm hoping so, because it would definitely be quicker and easier than my hit-and-miss method. It looks to me like the URL stays the same when scrolling up/down a thread, but I'm probably missing something...