Since June we are working on this release. First thing you will notice, this release was not tagged 0.9.0 as we would have normal done. Well, we had a discussion with all developers and decided to go for date tags from now on.
Also new is: we ship with Calamares as an alternative graphical installer. It is now stable enough to be used on productive systems. You can still use Thus. Also our terminal installer got some small improvements. So stay tuned for the fresh ISO image hit the net …
There are other changes listed here.
Under "Currently supported kernels" it lists 4.2. Are the currently supported kernels ones that ship out of the box, or do they come as updates?