So we got ready to launch one of our new products yesterday and one of my team members found an issue rendering my Flex in IE6.  Here's a little background, rick set up a modal window to pull in the flex app and found that Flex was not rendering in IE6 when the modal fired.  He spent some time researching the issue and found that IE6 does not have support for percentage based height/width.  Since my Flex is constraint based, it only appeared not to render.

Rick came up with a working solution in Javascript that calculates the value of the modal window height/width based upon the resolution of the users browser.  You can find his post and solution at http://cooldotnetstuff.wordpress.com/2009/07/14/ie6-set-object-tag-width-and-height-dynamically/ .