Not sure if it's just me, but for some time there's always a "quot" after quotation marks in the forum:
[imgzoom]https://i.imgur.com/MP04h1g.png[/imgzoom]
Yup. Since at least June 2021 (https://www.adventuregamestudio.co.uk/forums/index.php?topic=47530.msg636636710#msg636636710). Same with &, which displays as &.
(It's only in the board preview on the main forum page, not in the actual thread list on each board.)
Yeah, it's presumably a bug in SMF core or one of the plugins we use. It doesn't seem to happen in our work-in-progress implementation of SMF 2.1, so please wait for that!