My timeline:
Received an email telling me that I need to change my application in order to "receive employment consideration" (I had to say I was willing to relocate). I received that email on Nov 5th. I received my interview invitation on December 10th for a February interview. If you are getting the "fix-it" email, that is a very good sign. I know another guy who got a similar email, followed up in a few weeks by an invitation.