Without an xorg.conf, i810 driver was chosen incorrectly. Details to follow, if needed.
Come on, could you elaborate a little bit on what you mean? That without using any /etc/X11/xorg.conf we default to i810 instead of intel driver? Yes we do, because intel is not stable enough to be default. And?
ajax, you know what to do, so here is the bug ;-).
He's done so. Fixed in 1.3.0.0-26.