AFAIK users are still not notified when somebody edits their question.
In this question Federico thought he could add a few lines to the question, apparently convinced that the original meaning wasn't changed by the edit.
Kevin doesn't agree and rolls back. So that's two people who think they know what the asker's intentions are, and who come to opposite conclusions. Obvious, because neither actually asked the OP what he meant.
If the asker of a question would be notified of changes she can decide herself if the edit fits with her intent, and rollback if she doesn't agree. This way others don't have to guess about it.