Index: wp-admin/includes/class-wp-posts-list-table.php
===================================================================
--- wp-admin/includes/class-wp-posts-list-table.php	(revision 20951)
+++ wp-admin/includes/class-wp-posts-list-table.php	(working copy)
@@ -562,7 +562,7 @@
 			break;
 
 			case 'date':
-				if ( '0000-00-00 00:00:00' == $post->post_date && 'date' == $column_name ) {
+				if ( '0000-00-00 00:00:00' == $post->post_date ) {
 					$t_time = $h_time = __( 'Unpublished' );
 					$time_diff = 0;
 				} else {