Just tried it in IE7. Works fine there. Must bee something I done then.
No, not your fault, or the browser even. A stray line of CSS that (bizarrely) IE6 and 7 overlooked, Safari and Camino didn't mind, and even an old version of Mozilla could deal with; but threw that version of Firefox.
If you give the page a refresh or two it should work fine now.
my orders are to sit here and watch the world go by