Still haven't found an answer to this one. In fact, the problem has gotten worse. I am trying to add some menus to a sidebar. This sidebar is nested within a number of divs with both relative and absolute positioning and different paddings and margins. Works fine in Firefox, but IE6 renders the popup about 5px lower and IE7 renders it lower and to the right. I noticed that if I remove padding from parent elements, the popup positions closer to where it should, but not perfect. Obviously I don't want to have to affect the rest of my layout to get this working though. Is there any way to get the popup to position properly in all browsers?