I finally got some time to experiment with the new hair particles, and I ran into an apparently fixed bug. When I create a particle system, make the hair editable and fool around with it (comb, cut…), and then add an extra particle system (by clicking on the “1 Part 1” thingie in the Particle System panel), Blender crashes. It seems to happen every time. If I just add a new particle system to the object and then add a second one immediately, it works. But if I add a new particle system after doing any editing in the first, it crashes.
Does anyone else have this problem?