Mistakes happen. Considering the amount of volume Nashbar is dealing with, I highly doubt they even open the boxes to inspect complete bikes before sending them out and it was most likely a factory error.

I recently bought a microwave for the shop that was missing the glass turntable. Considering it was in a sealed box, it was in no way the fault of the store where I purchased it and they provided me with the missing piece without question, just as Nashbar came through for bfloyd.