[CAG CheechDogg]

Thats because your stats for the post thanks/likes is not wrapped correctly when you added that collapse button ...

For the background, you can just add this to your additional.css file:

.postbitlegacy .postbody, .eventbit .eventdetails .eventbody {
background: #d5d5d5;
}

or let it just blend it with the default background you have which is what I would personally do ...

.postbitlegacy .postbody, .eventbit .eventdetails .eventbody {
background: none;
}

or this so that it adds the textured background that you have for the body wrapper...

.postbitlegacy .postbody, .eventbit .eventdetails .eventbody {
background: url("images/brightstripes/misc/body_background.jpg") repeat scroll 0 0 #c5c5c5 !important;
}