I was reading about Improved Combat Reflexes and Greater Combat Reflexes in the lates Poly and I noticed that the Benefit section in both feats seems to be the same.
I bet the intent was for improved to grant 2 attacks, and Greater to grant 3. A interesting and broken pair of feats. But has a feature NPC a gith disarm machine with those 2 feats would be neat-o.
Actually, I think that Greater Combat Reflexes is supposed to work like Greater TWF: Granting three attacks at BAB/BAB -5/BAB -10 for any given opportunity.