All I mean is that I have no facility to scroll the window down.
It’s working fine today in Firefox but to the right of the window I have a scroll-bar. To scroll you click and drag that, or if you use the scroll-wheel etc then the bar moves as the page moves. In IE8 there is just no facility to scroll and so anything that falls off the bottom of the page is inaccessible.
Compare this screenshot: http://ugilabs.co.uk/Scrap/EMSL-FF.PNG
with this one: http://ugilabs.co.uk/Scrap/EMSL-IE8.PNG
You will see in the latter that no scroll-bar exists (red ring) and so you can’t access the bottom of the page.