EDIT: The rest of the forum themes have been upgraded (including Brave and Subway). Tapatalk should also be working once again.
EDIT 2: Badges/Awards are back
The forums have been upgraded to version 4.2. With this update comes several new features and changes. I have pulled some of them from the changelog for your viewing pleasure:
Clubs - Clubs are a brand new way of supporting sub-communities within your site. Many people have requested social group functionality in the past and Clubs are our implementation of this concept.
For now, clubs will have to be approved by a moderator before being published. Within a club, you can manage your own set of moderators, individual forums, and calendars. Global site rules will apply within clubs.
Reactions - Offer more fine-grained sentiments towards content than a simple up/down or 'like'. They are now in common usage on social networks, and so users expect to be able to be more nuanced in their response to something they see.
NOTE: Depending on the reaction, the user will also receive +/- or neutral reputation.
Leader board enhancements - For 4.2 we made some improvements to the Top Members section of the Leaderboard. A new overview page tab shows a selection of the top members across different criteria.
Check it out here: http://www.joinsg.net/leaderboard/
Authy integration - While 2-Factor authentication has been present since last update, Authy support has been added with this update. Check out here for more information.
Shoutbox - With the new update, we decided to give the chatbox another try. Look for it at the top of the main forum view page. Global forum guidelines apply for all messages. Note that messages will auto refresh every 10 seconds (restriction by the application).
Themes - There have been minor tweaks to all the themes to support the update. Right now only Spectrum and Dashboard have been updated. Brave and Subway will be updated soon.
For more upgrade information from IPB, check out this page: https://invisioncommunity.com/news/invision-community-42-r1030/
Bugs/Suggestions - Please post any problems or suggestions you have in the Website Bug Tracker (located here or under the "Server Info" drop down on the main menu).