Hi Peter,
afaik the BBS chokes on not working image links, like this one in your post:
http://www.sound-o-mat.com/images/QuadraVerbPlus.JPG.
If you know the post number (which looks like this part in the URL you get by email when watching posts: p=number, like in
www.groupdiy.com/forum/viewtopic.php?p=117819#117819
EDIT: 118558 is the number, i think /EDIT
you can try to edit a random post of yours, replacing the p=something with p=numberofthenotworkingposting in the middle of the URL in the browser window, this might get you to the offending posting to remove the image.
;Matthias (in a hacker mood) :twisted: