Try leaving the first 2 PCI slots empty - the 64 bit ones. 

The other PCI slots go through a PCI-PCI bridge.  The bridge masks 
the bug in the Pyxis. 

Standard disclaimer stuff.  I've never worked in that area, just 
read things off the net.

If that works, we should add this to some web page.  Or maybe
add the URL to the WARNING message.