did MS11-100 add default Response headers?

I happen to have screen grabbed the response headers on our asp.net 4/IIS 7 website late December for a security audit.  Today, I noticed they are different, a couple of new headers were added

X-Powered-By:  ASP.NET

Pragma: no-cache

Cache-Control: no-cache

Expires: -1

I remember explicitly taking out the X Powered By header as requested by the security auditor.  Now it's back, along with these others.  And again, I can be sure of that because I used Chrome and a custom add-in to display headers, then screen grabbed that info. 

So far, the only thing I can track it to is the security update from MS11-100.  Can anyone confirm this?