[Schwarze Katze]

No problem Has been better for me anyway 'cause I think I finally understood the code design.

Here's what I did.
Instead of putting a <div> behind every first level categorie I put a <br /> before them. This way it still works when you're having forum on the first level and not only categories. (I hope you understand what I mean *coughs*)

All you've got to do is modify the forumhome_forumbit_level1_nopost.
Replace

<tbody>
	<tr>
		<td class="tcat" colspan="<if condition="$vboptions[showmoderatorcolumn]">6<else />5</if>">
			<a style="float:$stylevar[right]" href="#top" onclick="return toggle_collapse('forumbit_$forumid')"><img id="collapseimg_forumbit_$forumid" src="$stylevar[imgdir_button]/collapse_tcat{$collapseimg_forumid}.gif" alt="" border="0" /></a>
			<a href="forumdisplay.php?$session[sessionurl]f=$forum[forumid]">$forum[title]</a>
			<if condition="$show['forumdescription']"><div class="smallfont">$forum[description]</div></if>
			<if condition="$show['subforums']"><div class="smallfont"><strong>$vbphrase[subforums]</strong>: $forum[subforums]</div></if>
		</td>
	</tr>
</tbody>
<if condition="$childforumbits">
<tbody id="collapseobj_forumbit_$forumid" style="{$collapseobj_forumid}">
$childforumbits
</tbody>
</if>

with

</table>
<br />

<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
<thead>
	<tr>
		<td class="tcat" colspan="<if condition="$vboptions[showmoderatorcolumn]">6<else />5</if>">
			<a style="float:$stylevar[right]" href="#top" onclick="return toggle_collapse('forumbit_$forumid')"><img id="collapseimg_forumbit_$forumid" src="$stylevar[imgdir_button]/collapse_tcat{$collapseimg_forumid}.gif" alt="" border="0" /></a>
			<a href="forumdisplay.php?$session[sessionurl]f=$forum[forumid]">$forum[title]</a>
			<if condition="$show['forumdescription']"><div class="smallfont">$forum[description]</div></if>
			<if condition="$show['subforums']"><div class="smallfont"><strong>$vbphrase[subforums]</strong>: $forum[subforums]</div></if>
		</td>
	</tr>
</thead>
<if condition="$childforumbits">
<tbody id="collapseobj_forumbit_$forumid" style="{$collapseobj_forumid}">
	<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>
$childforumbits
</tbody>
</if>