Well, I'm not sure what to say... I have now verified for myself that the issue occurs in IE7 on both a Windows XP SP2, and a Vista machine!
I've also checked crossbrowsertesting.com, and the issue occurs in the same places as well.
I've also downloaded IE Tester (free at: HomePage) and if you check IE7, the same thing happens... the dropdowns in the horizontal menu disappear when you try to mouse over them!
If 'anyone' has any idea what is going on... I would greatly appreciate the assistance!
Thanks in advance!
Again, the website is www.gateslodge.com (check the dropdowns under Fly Shop, or Learn)