I've noticed this for a while and decided I probably should ask about it.
When I look at a users profile via the admin board under their email required that has there email in it there is a yellow box that says, "There is a pending change of your e-mail to firstname.lastname@example.org. Cancel"
I have a non-networked blog and it does not do this.
The email is the sites main email address. When I click cancel takes me to my profile. When I go back to see if it was cancelled it shows the same message.