datepicker Bug? setting a certain dateFormat defeats constrainInput

datepicker Bug? setting a certain dateFormat defeats constrainInput


So, if I set up a default like so...
$.datepicker.setDefaults({ dateFormat: 'MM d, yy' });
or initiate like this...
$('.selector').datepicker({ dateFormat: 'MM d, yy' });
My datepickers no longer constrain the user input - it becomes a wide
open text input. Seems strange but it looks like these two options are
conflicting when I use the MM formatting for months. Anyone else
experiencing this?