theironcook/Backbone.ModelBinder — pull request #134 by BigBlueHat (2013-04-29 21:26:30+00:00)
Title: made binding of optional model attributes possible

Removed "Bad binding found."
Set elementBinding.boundEls = [];

This allows you to use ModelBinder with models that have optional attributes that may or may not show up in the DOM at any given time.