You can effectively do this in IE9 by setting the compatibility mode per site or domain (Tools -> View Compatibility ->Etc...). Then, you have 3 browsers in one! Joy!!!
Ah, good, I can post now (according to the dev tools, you're forcing IE7 compatibility mode). So much for "IE runs the same markup as the others," though.
RSS has been demoted to the command bar... there's no way to move it to someplace useful, and there's no way to just toggle the command bar temporarily like you can the menu bar (you have to turn it on, then turn it back off afterwards). Pretty inconvenient
if you use IE's RSS features a lot.