(Please don't laugh)
If you look at http://www.petalsandpatches.com/applique.htm in both IE and FF you will note that in IE the navigation buttons are missing (not quite true. The upermost button is 1/2 present).
After some investigation I discovered that it is <i>..</i> around some certain text that is doing it viz. if I remove the <i></i> the buttons are back.
Why would/should the <i></i> apparently cause so much trouble, although the font size is different between the paragraphs? I will not discount that it might be the <p></p> as well.
Does anyone have any ideas or seen this before?