Cant select date on same month as last selection with keyboard

With a pre populated date field, use the keyboard to navigate to the field to open the datepicker. Use ctrl+direction to navigate to another date on the same month. Hit enter to accept the date.

The date is not updated. The date should be updated.

Works if you navigate to a different month.

I can reproduce on the datepicker demo page. http://jqueryui.com/demos/datepicker/