I have just about finshed a site I am working on. When I realised that if I use actual height for my #middle div ie 475px, the footer is then too high and sits under some content text (in IE and FF).. See here
But if I change the height to 100px, the problem is solved. I then check the webpage in FF and low and behold the side.jpg has disappeared...
I must be missing something, could anyone give me an idea? :)