Steve, I think this was done intentionally. The modifications that we discuss above also turn the ready light off. The D2x doesn't fire when it receives ready light signal from two wired flashes, that's where all problems come from.
Take a look at this topic for a more detailed explanation:
Luiz, whats interesting is that in the current ND2 housings Subal only connects the trigger pin. The ready light is disconnected (obviously) but also the TTL and Monitor. At least now I dont have to disconnect mine Julie can use the newer strobes that are interacting badly with the D2x