Am I Protected with IE9 and NIS 2011?

I have NIS 2011 and recently installed IE9 via Windows Update.  Do I have full protection?  I'm referring to the major protection components like auto-protect and intrusion protection.  I can live with compatibility issues like missing safeweb icons until the next update comes out in early May.  I would just like to be assured that there are no major protection issues.  I read some things in the forum about compatibility issues but don't know how serious they are.