I don't believe Chrome will do anything about WM4 incompatibility.
I got around this problem on my website by using transparency gifs and rollovers.
See the result: http://www.tysaustralia.com
Put the cursor over "Vacation Australia" to see the submenu items.
Try it in IE then Chrome. You see the differerence.
In Chrome the submenu is shown when the cursor is on "Vacation Australia" but it it actually disappears when you move it away. But if you move the cursor under the main menu item it shows the submenu items in transparency and rollover gif format, which works ok. These rollovers are not seen when viewed in IE.
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