The release candidate also includes improvements for batch processing and color matching profiles for the Sony RX100 III, Sony A7S, and Sony Alpha A77 II. Additionally, there are several new lens profiles now supported.
Bug fixes in Camera Raw 8.6 include the following:
Fix crash on launch in some cases on Hi DPI (Retina) systems.
Fix crash when opening some Sigma SD9 raw files.
Fix issue with JPEG images saved by Camera Raw not readable in some external applications.
Fix automatic lens profile selection for Leica M (Typ 240) when using most recent firmware version.
Fix issue with some Hasselblad H5D-50c and H5D-60 3FR raw images appearing slightly too dark. Unfortunately, this fix may affect the appearance of existing images captured with this combination of settings. It is recommended that you (1) purge the Camera Raw cache via the Camera Raw Preferences dialog, and (2) review previously captured images for unexpected brightness changes.
You can download the release candidate at the following link from Adobe Labs:
Remember, this is a release candidate, which means it has been pretty well tested and Adobe thinks it is ready for full release; however, it’s recommended that you keep production work to prior versions until the official release drops. Expect those to come soon though. Release candidates mean that the final versions are just around the corner.