I am having the same problem as reported in http://forums.adobe.com/thread/438800. I have the Adobe Reader object on my HTML page using the EMBED tag along with a CSS-controlled drop-down menubar at the top built as a TABLE. When I hover over the menu bar to display the submenu, the portion that overlaps with the Reader displays underneath the object instead of on top of it. I've played with z-index ordering and wmode=transparent but with no luck. Any ideas on how to resolve this so the menu displays on top of the Reader object?