What I did:
Registered here with Github (social registration). I get automatically logged in. I directly went to my profile. Changed Username and Email (taken from Github). Now I saw the popup telling me that I still didn't confirm my email address. Checked my newly entered mailadress... nothing. Checked the mailaddress which came from Github. Yes a confirmation mail. Clicked on the link. "Invalid confirmation link".I needed to resend the confirmation email manually before I could post.
What behaviour I would like to see:
When I change my email address I need to get a new confrmation mail automatically (Opt-In active).