The new update to WordPress is now available, from their website:
“If you’ve been around WordPress a while, the most dramatic new change you’ll notice is a completely re-imagined flow for uploading photos and creating galleries. Media has long been a friction point and we’ve listened hard and given a lot of thought into crafting this new system. 3.5 includes a new default theme, Twenty Twelve, which has a very clean mobile-first responsive design and works fantastic as a base for a CMS site. Finally we’ve spent a lot of time refreshing the styles of the dashboard, updating everything to be Retina-ready with beautiful high resolution graphics, a new color picker, and streamlining a couple of fewer-used sections of the admin.”
Update via your WordPress admin panel or download here.