With the release of the Internet Explorer 9 Beta today, I just wanted to make sure that everyone knows not to install IE9 on any machine using CRM Online, CRM 4.0 or testing out the CRM 2011 Beta. IE9 Beta is currently unsupported for all three CRM environments, and if the IE8 Beta is any indication, it will break things in a big way.
So enjoy testing the Internet Explorer 9 Beta, just don't do it on a machine that uses Dynamics CRM.