Sister blog Inside Facebook reported that events was one of the features that had not yet been rebuilt for speed, and both the main events page and individual events are loading noticeably quicker.
As for photos, when viewing them in full-screen mode, an ellipsis icon offers options to save the photos, share them, or report them. Inside Facebook pointed out that users previously had to perform screen captures to save photos, and they were required to exit full-screen mode before sharing or reporting them.
iOS users: Have you updated your apps yet?
Group chat screenshot courtesy of Inside Facebook.