Your web server is returning 404 (file does not exist) for paths like http://mobtalk.org/board/images/smilies/icon_mad.gif
that would have been established during a new 3.2.4 installation. First stop would be to check whether that subdirectory of the /images/ folder exists, and whether it contains the files you see it should have received from a 3.2.4 full package download/upload.
If the files are actually there with the expected names in that /images/smilies/ folder, another possibility is that the .htaccess has extra rules that are re-writing paths with .GIF extensions. Intended to solve some other problem, but introducing an unintentional issue here.