[wastemytime]

Thank you. I'm stupid. I did go through the vBookie Installation, and this part:

In Template newthread
   FIND
   --------------------------------------------------
   $threadmanagement
   --------------------------------------------------

   ABOVE that ADD
   --------------------------------------------------
   <if condition="$show['vbookieevent']">
	<fieldset class="fieldset">
		<legend>$vbphrase[post_a_vbookieevent]</legend>
		<div style="padding:$stylevar[formspacer]px">
			<div><label for="cb_postvbookieevent"><input type="checkbox" name="postvbookieevent" value="yes" id="cb_postvbookieevent" tabindex="1" $checked[postvbookieevent] />$vbphrase[yes_post_a_vbookieevent_thread]</label></div>
		</div>
	</fieldset>
   </if>

was gone. Now everything is working fine.

I was 100% sure, i didn't change any Template...