Opening A Can Of Worms
I got rid of the "fixed" positioning and tried 1st "float:right;" and then no positioning/alignment of any kind.
On the 1st attempt, I got scroll bars in most browsers & the fly-out seemed to appear behind the #content division.
On the second attempt, I lost the scroll bars but nothing flies out at all.
I removed the now superfluous <div></div> surrounding the menu but still no joy ( or fly-out).
I'm scared to see how this looks in IE 6.