The build 283.0 (beta) is available in the Product Owner's Lounge forum and soon in the community passport.
This is not the final version of the build 283, we still have a couple of things to do, mainly in HTML5 and iOS. The next update should be released when this is done, within 1 or 2 weeks.
As usual this is a beta version, so make backup copies of your MFA files, just in case...
Let us know if any new problem in this version, thanks!