This is a wordpress site and I am not as familiar with it as I am with static html sites.
I have tried the usual fix
position: relative on header, content and content-entry with a z-index of 2 on header and 1 and content and content-entry, and my menu is still disappearing behind the iframe video in IE7 and 8, haven’t looked in 9 yet.
And if that was not enough, the first li tag in the drop down is way shorter than the others.
Here is the link to the test site http://bit.ly/xOIvMP