...although I should stop calling it atlas since the asp.net team renamed it "asp.net ajax extensions"

Pretty crazy that there's no apparent fix for the security warning you get when using the hover menu.   That tells me that either not a lot of people are using the hover menu (so rock on with my bad self for being on the cutting edge), or the folks at MS just don't think its a big deal.   After all, they can release software and call it a "Community Technology Preview" and then it is what it is; whatever works works and whatever doesn't doesn't.   Kind of like launching something in BETA.  You can have it in "BETA" indefinitely.  Hey, it's beta so use it at your own risk.