Code:
<!--
height = screen.height;
width = screen.width;
res = document.getElementById ('resolutionNumber');
res.innerHTML = width + " X " + height;
if (res == null)
{
alert ("hello");
}
I did some digging around, and found this in the code.
Seems that this resolution is what IE throws at the site, in order to force larger text into appearing. Either that, or to display something close to a WVGA resolution.