@jmw: heute means "Today" and you don't need to create a user for this hack. I simply missed to translate the german phrase (it's fixed now

)
@Volvoholic:
1) no it should work in the child style if you changed it in that postbit. Did you switch your forum view to that specific style?
2) yes. Google adsense is content based and it will show different ads for different threads.
read google help or visit webmaster communities like
www.theadminzone.com or
www.digitalpoint.com for more infos and tips about adsense
3) that is generaly a bad idea because google is a guest too. If you block guest views google can't index your forum (you lose new visitors) and can't deliver targeted ads (you lose money).
replace the condition at the beginning of my code with:
Code:
<if condition="THIS_SCRIPT == 'showthread' AND $post[postid] == $GLOBALS['qrfirstpostid'] AND ($show[member]) AND $bbuserinfo['usergroupid'] == 'X'">
and the X in $bbuserinfo['usergroupid'] == 'X' with the ID of the usergroup you want to see the ad