Re: 2.6.5 and "Badness in pci_find_subsys"
Bought a new graphics card (Nvidia mx4000) and low and behold problems are gone.
Using the same 5336 driver and 2.6.5 kernel and same mb/memory. Just not using the built in graphics card any more.
So it looks like for me at least it was a memory hardware issue, nasty in that without running anything graphical, memory tests passed OK.
Thanks and hope this saves someone some time.