I just managed to find and sink the Sicilian crusaders. After flat out disappearing for several turns, the army re-appeared on Sicily, then boarded a ship before my assassin got to him. The ship just sat around for a turn and I was able to sink the entire fleet.

Still no end to the crusade, and I've searched everywhere with FOW off, but no dice. There was that damn Portugeuse fleet earlier, but it's just blatantly no where on the map anymore. I'm flumoxed.

BTW, I did manage to kill 2 popes (cool and different videos, too) but that did not end the crusade.

I'm kind of becoming resigned the the fact that my poor turks will be at war with all of Christendom for the rest of the campaign.