I spoke to the Pinpoint guy at Oshkosh.  He was very careful selecting his words when I asked about the Chelton/D2AV situation.  He basically told me that the problem was isolated and corrected, but their product got dropped from the experimental side of Chelton anyway.  He described the problem as a slow booting circuit in the AHRS, in other words, systems were booting in the wrong order.  Once they found of what was happening (difficult since it didn't happen very often) it was fairly simple to correct.

 

I'm not sure about the timing of the fix with the decision to drop Pinpoint, but what I've described above may play into this whole thing.