User blog comment:Dopp/Technical Update: May 31, 2011/@comment-3104099-20110601031733/@comment-3104099-20110601102723

But everything will be changed once you undo the edit. At the moment to undo an edit in the middle you must undo every edit made after that edit. Doing this everything will be changed in the end to the earlier version. But if we are able to undo an edit in the middle without undoing every edit made after that edit it will be easier for us. Also the results will be the same as the above one.