RobinHerbots/jquery.inputmask — pull request #744 by ragingsmurf (2014-11-25 03:08:05+00:00)
Title: IE 9, KnockoutJS Binding Problem

Binding an ObservableArray with Mask bound items, the binding manager was throwing an error that it didn't like a the e.preventDefault. Adjusted it to check for this method, and then bind. This fixed my issue in IE9.