Picked up several LinkedIn invites while in Vienna and I couldn't remember my password. Naturally, they have a "reset password" form. As a thoughtful nod to privacy, after submitting your email, it says something along the lines of "if email is in our records ..."
Ah, cool. I do respect companies who try not to leak information. Unfortunately, the first time I entered my email I mistyped it and received the glaring error message "the email address you entered is not in our records."
Nice work, guys.