Testpage 3.
In this testpage the width of the menu items and submenu items is omitted.
A fake class causes IE to display the links as the expected blocks!
Zoom in and out with View/Fontsize (or Ctrl-Scrollwheel), and mouseover the menu for demo.
Now working again in IE as well: for the whole line of a link in a submenu-item.
Still the old problem remains: in case of enlargement to 2 lines: the upper upper items can only be reached by mousing from above downwards;
the under items only accessible bottom-top. Can be problematic if 3 lines of items!