Mudcat pages don't announce a character encoding, though I noticed on looking at this one that there was a meta tag specifying UTF-8 but it's been commented out.

The problem for Mudcat is that the pages are written by posters using different character encodings, so whatever it specifies in the page header won't necessarily be true.

*** Ah - the threads LIST does say UTF-8 - so that could explain why titles show differently on the list from on the thread itself.