[CyberAlien]

The only way to do what you want is to set fixed width for forum, and then set fixed width for that table and every column of that table. Hovewer browsers will still change width if needed depending on content of table cells. So ether way you won't be able to do that for 100% and sometimes table cells will change width.

Look for this code in forumhome and forumhome_forumbit_level1_nopost templates:

	<tr align="center">
	  <td class="thead">&nbsp;</td>
	  <td class="thead" width="100%" align="$stylevar[left]">$vbphrase[forum]</td>
	  <td class="thead" width="175">$vbphrase[last_post]</td>
	  <td class="thead">$vbphrase[threads]</td>
	  <td class="thead">$vbphrase[posts]</td>
	  <if condition="$vboptions['showmoderatorcolumn']">
	  <td class="thead">$vbphrase[moderator]</td>
	  </if>
	</tr>

and assign width to every <td>