diff --git a/diff2.js b/diff2.js
index 48349b5..5e447b3 100644
--- a/diff2.js
+++ b/diff2.js
@@ -831,9 +831,10 @@ function(A, B, cmp){
 // 		with the original implementation and use diff(..) as a sub-tree 
 // 		comparator...
 // XXX need:
-// 		- skip unchanged subtrees
+// 		- skip/clear unchanged subtrees when removed
 // 		- link comparison -- should support linking from both sides...
 // 		- item relative indexing (DONE)
+// 		- ... (anything else???)
 var keyValueDiff =
 function(A, B, options={}){
 	return diffSections(