Ticket #24873: 28873.diff

wp-admin/includes/revision.php

@@ -179 +179 @@
         // Now, grab the initial diff
         $compare_two_mode = is_numeric( $from );
         if ( ! $compare_two_mode ) {
-                $from = array_keys( array_slice( $revisions, array_search( $selected_revision_id, array_keys( $revisions ) ) - 1, 1, true ) );
+                $from = array_reverse( array_keys( array_slice( $revisions, array_search( $selected_revision_id, array_keys( $revisions ) ), 2, true ) ) );
                 $from = $from[0];
         }
 

wp-admin/js/revisions.js

@@ -656 +656 @@
                         _(tickCount).times( function( index ){
                                 this.$el.append( '<div style="' + this.direction + ': ' + ( 100 * tickWidth * index ) + '%"></div>' );
                         }, this );
+
+                        this.reportTickPosition();
                 }
         });