jzaefferer/jquery-validation — pull request #1125 by omercnet (2014-05-21 22:36:30+00:00)
Title: for required input text, verify it doesn't match placeholder

Seems like if a user hops over an input by focusing and defocusing, form submits with the placeholder as the value

Added this check to also make sure the input isn't the placeholder (meaning it's still actually empty)