Adding code tags does not appear to render correctly, could be an isssue with bb tag replacment perhaps
.subforum-column {
margin-bottom: 0px;
}
.subforum-info.subforum-column {
margin-top:0px;
margin-bottom: 3px;
}
Should be multiline
Postet den
ok, that's odd. Format is ok here. Must be something else in the post causing it!
Postet den
You can change it easily, to remove the gaps (like below) you just need to add some css
I just added this css override 
.subforum-column {
margin-bottom: 0px;
}
.subforum-info.subforum-column {
margin-top:0px;
margin-bottom: 3px;
}
Postet den
OK, something in the post is causing the issue
Postet den
looks like it was just a glitch, seems to be ok now