IE8 Image Map and Position Absolute Issue

Question

Guys,

I'm working on a project where I have a image map and when I have a dom object that have a absolute position over that image map area, the image map shines through over some elements.

Its really quite bizarre. It only happens over some elements and others its fine. But when it actually shines through I can actually click the tooltip that is associated with it and navigate to the link.

Any help would be appreated!

Thanks!