Missing code for only sidebar right. Someone needs to add this in.

Trust me, if I knew how to add a patch, I would.

Anyways, when you get rid of the left sidebar and opt for a right sidebar only, the right sidebar will sink below the content area. This is because the content (center) is missing a float to the left.

A simple fix is to add a float: left; to the body.sidebar-right #center:

body.sidebar-right #center {
float:left;
border-right:1px solid #E9EFF3;
padding-right:10px;
width:802px
}

That fixes it.