Google Chrome and McAfee Anti Virus

Chrome threw the following error when posting to a forum:

(my login name and domain is deliberately blanked)

This warning 'Exploit-ObscuredHtml' isn't thrown when doing exactly the same in Internet Explorer, so I'd be interested to know why it's throwing the virus alert. Possibly because it's running the javascript in a separate process to the HTML? Unlikely. More inclined to think it's because it's in the unsecure 'Documents and Settings' folder whereas IE uses the rather more locked-down Temporary Internet Files folder.

Either way, I can imagine lots of sites would use Javascript that would trigger this and I'd imagine other AV tools would flag it too. Surely the AV vendors and/or Google need to address this somehow? Isn't it a bad place to put files that you will run script? If you have seen this behaviour as well then feel free to post the Url and the name of your AV tool.