on your smilies page (when you click "get more" under the smilies pane in the post window) if you edit your source code to have a:
at the end of it, the smilies wont stop moving after you click on one of them.
ok so I just looked at your source, and you're not using onclicks, but in your a hrefs, try using, for example:
:smilie(': screwy:'); return false;">
that may work.
Nice forum tho - im enjoying it thoroughly!