I tied this out on two different websites. Turning off the effects/shadowing worked perfectly for one, but not for the other.
Menu fixed: http://www.jet-mail.com
Menu still not showing: http://www.bostonwebdesignco.com
(the size of the menu shows, where if I take the .js out the space goes away, but it never shows the menu)
The menu does not show at all for the second site. I have a LOT of sites to fix. The differences between the two is one uses one line drop downs (br tag) inserted into tables (jet-mail). The second one uses tables and splits them into separate table columns to get the desired look and feel for multi-column.
I even disabled the pop-up direction part by setting both X&Y to zero. Still won't show in IE 10