Besides the ability to pass along posts with others, the update brings 38 language compatibility to Google+, a small improvement in "notification reliability", easier to understand Instant Upload options during the initial set-up, and the ability for you to create a new circle from the "Circles" destination.
The update also gets rid of some bugs like the one that afflicts some HTC users and would make copies of Instant Uploads. Some users of Google+ had problems in Huddle with "No Name" coming up instead of a real user name. That bug has been fixed as has the problem that made the notification count change when your device's orientation was changed was from portrait to landscape. Those who could not create a new circle from the "Circles" destination will now be able to, thanks to the update, and when new messages are sent the hidden 1:1 Huddles will now reappear. Finally, there have been some minor tweaks and changes to the UI and some other "performance fixes".
The updated version of Google+ is available for free in the Android Market. For those who have started using Google+, let us know how the update has improved the service for you by dropping a comment in the box below.
source: Google+ (Punit Soni) via AndroidCentral