Last versions of Yafaray for blender 2.5

Has anyone tested the new versions from graphicall.org?:
http://graphicall.org/?keywords=yafaray

I’m testing the 32bits windows version (http://graphicall.org/107), and it seems very integrated in blender but I’ve noticed some changes in some old scenes of mine from 2.49b, maybe because I don’t understand the new parameters.

Does they worth to be replaced from the 2.49b version or is it not enough stable and complete?

From what I’ve used, it seems very stable and usable. There’s even a little button at the bottom of the materials panel to auto convert materials from older versions of Yafaray.

Thanks, I need to test it a little bit more, but in my case it crashed twice. I think because of the preview of the materials, is too slow.