<meta http-equiv="X-UA-Compatible" content="IE=9" /> will crash hosted mode

Has anyone tried adding

 <meta http-equiv="X-UA-Compatible" content="IE=9" />

to the app page html?

I would like use the better css implementation of IE9 (e.g. round corner) and 开发者_StackOverflow中文版added that piece of meta tag. It will restart the IE every time i run hosted mode. I have both gwt sdk 2.0.3 and 2.1 rc1 installed in different instance of eclipse and none of that work.

IE9 is not officially supported yet, see #5125.