Ok, thanks Jeremy.

I'll look at doing that further down the line.  I've tried not to specify too many sizes, so it shouldn't be too much of a problem.

Edit:- I'll edit that response.... I've changed the stylesheet to us EMs... even with EMs it looked bad in IE, so I've tweaked the sizes slightly so there is no noticeable difference in FireFox, but the IE version looks much nicer. Header and footer are now clearly legible.