This is a prob for the 5600
Mine is a pxa 250. It runs beautifully on the watapon Rom which, I think, has the bug fix turned off in the kernel.
If you want both speed and the bug fix the openzaurus kernel absolutely rocks.. better throughput on the data bU (lots better) floating point emulation, etc.
the problem hthere is that it is relatively new stuff, and all the roms have issues. The opis rom is, I think, your best bet on openzaurs, and should work for you..
If you have a lot of time on your hands and want a full distro you could add pocket worksation over openzaurus and access it via xqt (some z6000 guys have posted stuff on pocketworkstation and xqt--i'm trying it on watapon right now.)
adf