[billstelling]

Change class="threadbit" to threadadd or something else. I think it's messing up because it is a vb class already. You can then style it using the class.

.threadadd {
      border: 1px solid #000;
      border-radius: 3px;
}

Add that to additional.css and add background, border and what not. It's very easy to get it looking like it was part of vb to begin with..

It also might be because of using a div in the middle of it. I would have to look at how that section was coded. Been awhile since I've been in that template. Bottom line is it can be sorted and working the way you want it to..