When adding or editing a patron record, if the birth date is manually typed in and doesn't include the proper number and type of characters (MM/DD/YYYY), attempting to save the patron record will result in an internal server error. For example, 07/09/1999 will work, but 7/9/1999 will return the error. It would be very helpful if Koha would kick us back to the patron creation screen, preferably with an error or explanation message, rather than returning an internal server error.