Index: edit.php
===================================================================
--- edit.php	(revision 39549)
+++ edit.php	(working copy)
@@ -357,7 +357,18 @@
 <?php $wp_list_table->display(); ?>
 
 </form>
-
+<script type="text/javascript">
+	jQuery(document).ready(function($){
+ 		var post_table_form = $('#posts-filter');
+ 		jQuery( '#bulk-action-selector-top, #bulk-action-selector-bottom' ).on( 'change ready', function() {
+ 			if( jQuery( this ).attr( 'id' ) == 'bulk-action-selector-top' ) {
+ 				jQuery( '#bulk-action-selector-bottom' ).val( jQuery( this ).val() );
+ 			} else if( jQuery( this ).attr( 'id' ) == 'bulk-action-selector-bottom' ) {
+ 				jQuery( '#bulk-action-selector-top' ).val( jQuery( this ).val() );
+ 			}
+ 		});
+	});
+</script>
 <?php
 if ( $wp_list_table->has_items() )
 	$wp_list_table->inline_edit();