We are using NFA to monitor flows from our Cisco ASA installations.  We recently updated one of our ASA 5510 to 8.4(5).  After doing this we are no longer getting interface statistics.  I verified with wire shark that we are still receiving netflow data to the NFA server, and I can see netflow packets being received in the interface view.  Yet we are seeing no statstics for traffic in / out.  Any pointers or things to try are greatly appreciated.