I can get this to position perfectly on all screens by setting the position of the NOSSL sidebox to the very top from admin, then using position relative as opposed to position absolute.
This only causes one very small annoyance, the white space where the box contents would be (before position relative) is still there and it pushes the categories down the page a little too far.
I've tried setting the height of the contents and the height of the header bar to 0px like this:
PHP Code:
#absolutelinksContent {
height: 0px;
position:relative; left:1020px; top:-98px;
}
#absolutelinksHeading {
height: 0px;
display: none;
}
but there's still a large gap..