It's only a problem in FireFox. IE is working ok.
collapse_thead_collapsed.gif is the image shown vs. collapse_thead.gif and when you click the image the table will collapse like normal then vanish with only the Title bar showing. If you refreash the page the table is default expanded but still wrong image.
Code:
<table class="tborder" cellpadding="6" cellspacing="1" border="0" width="100%" align="center">
<thead>
<tr>
<td class="tcat" colspan="4" align="center">
<a style="float:right" href="#top" onclick="return toggle_collapse('showthread_hackinfo')"><img id="collapseimg_showthread_hackinfo" src="images/green/buttons/collapse_thead_collapsed.gif" alt="" border="0" /></a>
<strong>HACK TITLE</strong>
</td>
</tr>
</thead>
<tbody id="collapseobj_showthread_hackinfo" style="">
BLAW BLAW BLAW
</tbody>
</table>