5.3.0f1 (Release Candidate 1) is available

Please note the release notes are a full roll up, but at the bottom is a differential from b6.
Please also note the known issues where we already addressed items expected for f2 (RC 2)

Also, as noted elsewhere, SSRR is being pulled as of the next build (f2/RC2), but we aim to package it up still for experimental use via asset store or some other channel. In the meantime, it still can be extracted from the f1 Standard Assets.

http://unity3d.com/unity/beta/
(Note the upgrade guide as a stickied post)

Please remember to back up your projects before opening them in the build.

Please discuss and report issues via separate threads.

Best Regards,

Alex Lian