Bug 102825

Summary: [Mutation Observers] addedNodes and removedNodes should be empty NodeLists when type != childList
Product: WebKit Reporter: Rafael Weinstein <rafaelw>
Component: DOMAssignee: Nobody <webkit-unassigned>
Status: RESOLVED DUPLICATE    
Severity: Normal CC: adamk, arv, ojan
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   

Description Rafael Weinstein 2012-11-20 10:48:54 PST 
This was unspecified behavior which Gecko and WebKit implemented different. The DOM4 editor made the call and the decision is for the Gecko behavior (empty NodeList, as opposed to null):

http://dom.spec.whatwg.org/#mutationrecord
Comment 1 Adam Klein 2012-11-20 10:51:14 PST 

*** This bug has been marked as a duplicate of bug 98921 ***