wonder why it defaults to today’s date, not 01/01/1970? Is there a line which checks for an invalid or missing datestamp and helpfully inserts ‘today’ if it finds one?
date_i18n (called mysql2date () in wp-includes/functions.php)?
/ Sanity check for PHP 5.1.0-
if ( false === $i || intval($i) < 0 ) {
if ( ! $gmt )
$i = current_time( ‘timestamp’ );
else
$i = time();
// we should not let date() interfere with our
// specially computed timestamp
$gmt = true;
}