Index: wp-admin/includes/upgrade.php
===================================================================
--- wp-admin/includes/upgrade.php	(revision 33724)
+++ wp-admin/includes/upgrade.php	(working copy)
@@ -1592,10 +1592,15 @@
 	if ( isset( $cron_array['wp_batch_split_terms'] ) ) {
 		foreach ( $cron_array['wp_batch_split_terms'] as $timestamp_hook => $cron_data ) {
 			foreach ( $cron_data as $key => $args ) {
-				wp_unschedule_event( 'wp_batch_split_terms', $timestamp_hook, $args['args'] );
+				unset( $cron_array['wp_batch_split_terms'][$timestamp_hook][$key] );
+				if ( empty($cron_array['wp_batch_split_terms'][$timestamp_hook]) )
+					unset( $cron_array['wp_batch_split_terms'][$timestamp_hook] );
+				if ( empty($cron_array['wp_batch_split_terms']) )
+					unset( $cron_array['wp_batch_split_terms'] );				
 			}
 		}
 	}
+	_set_cron_array( $cron_array );
 }
 
 /**