just tried it on mine with firmware 1.00c and works really well
slight flickering at bottom/left where there's some kind of white bar; i haven't used chdk enough to know what that's for though. will experiment with it more later. looks very good anyway... makes this little camera much more useful when i don't want to carry my dslr's around (350d with hack, 400d with 400plus and a vanilla pentax k10d)
edit: the white bar is just the free space indicator
only slightly odd thing is when i tried to film some video, zoomed all the way in and then couldn't rezoom until i power cycled the camera. again maybe just something stupid i did.