Actually, I didn't replace the clutch master cylinder. It was the brake master cylinder--which is where I thought I might have gotten air into the clutch system.

A related question (and for Autozen), when I flushed the clutch hydraulics, I used a pressure bleeder from the top. Is it possible that air could have stayed in the system, with all the new fluid flowing by???

Would it be worth a try to reverse bleed the clutch? I didn't want to reverse bleed it before, since there was so much gungy fluid in the clutch system that I didn't want flowing up into the reservoir (with nice clean ATE fluid in it).