Google Maps and IE8

I've been knocking my brains out trying to find out why Google Map doesn't work correctly in IE 8, it works fine in FF though. Using the latest theme ver and wordpress 2.9.2 The map code is the iFrame as generated by google and pasted into the page in html mode.

http://www.canisphouse.com/how-to-find-us/

What I did find out, is that if I right click on the place where the map should be, and select refresh from the pop-up menu, the map shows. Any thoughts or ideas are greatly appreciated.

Thanks

John

PS, I have striped out image styling except for a 1px border