Gmail Contacts auto-save can now be disabled plus myriad of small updates
Gmail will also now point out any incorrectly entered email addresses visually, rather than simply telling you something was wrong. This will be handy for anyone addressing emails to a long list of recipients, as it'll be a lot easier to spot the typo. A few of Gmail's error messages have also migrated from pop-ups to in-window messages that allow you to action things more easily, while still getting on with the task in hand. Gmail will also now send you back to the message you were looking at if you happen to create a filter for 'messages like these,' a nice tweak that should save you some time.
If you're into your keyboard shortcuts, Gmail now has one turned on by default and that's the shortcut help key. Hit 'shift' and '?' together and you'll be presented with an overlay detailing all the keyboard shortcuts available to boost your productivity. Last but not least, the 'refresh' link is now a button on to match the rest of the buttons on the toolbar. Consistency in UI is important for a decent user experience, and now Gmail conforms just a little bit more.
To check out these little changes, all you have to do is head to your Gmail and have a look around the UI. Many people rely daily on Gmail in the browser, and these small, but important changes, can make the difference between a slick and productive experience, and a sluggish and frustrating one.