• notifications are more reliable: friend requests, hangout invites and event updates now arrive properly, with sound, even when real isn't open.
• adding friends is faster: a rebuilt QR scanner that reads codes more quickly, with a torch for dark places, and no more error when you back out of a scan.
• changing your email is smoother: your current address keeps working until you tap the link sent to the new one, and you'll now always see what went wrong instead of being left waiting.