I've seen a issue about reviews developing, and have finally found a good example.
On Stack Overflow we preach that posts are community-owned (to a point) and encourage collaborative editing of content. I have seen numerous times in the suggested edits review queue where I felt the editor edited too much extra into the answer, and rejected them. I just saw an instance here where an answer was updated with some more current information (to cover Iphone 5), and thought it was appropriate and approved it, but it was rejected by three others.
It seems like we need to be careful not to lose our proclivity for updating information.
I don't have any solution yet, just wanted to bring it up for discussion.