Ok I know no one cares but me, it seems I am the only one whoactually already owned a whole host of XENA cards when this came out, but I have arrived at the solution. 10 bit mode. My first tests were in 8 bit mode, and there was no compatibilty with the rest of the world. When I continued into 10 bit everything started huming along.
Funny aside… After Effects 6.0 is still not compatible, but combustion is in all of its versions.
Kevin