Thank you all for the reported issues in this version.
Several issues are fixed with the current RC5, like some ocio crashes and white balance crash.
I'll investigate the others and will release another test version soon with RC5, and the new AOV support.
Please note that the Composite texture on RC3 won't be compatible with the next version. (you'll be able to load the previous scene, but you'll have to re create those textures).
Remember that, as stated in the first post for this test version, it should not be used for production work..