PseRamesses, since the patch, I've seen the AI become quite aggressive with the use of transport, to the point where I now find myself being forced to garrison islands. It also seems to have no qualms about launching armies onto the mainland. However, I have never seen them transport a crusade army anywhere. In fact, in my current Byz campaign, I now have three armies (HRE, Milan, Venice) moseying towards Antioch through Asia Minor, while Venice has just invaded Iraklion. I don't believe the AI is treating Crusades and Jihads as ocean-going. Probably needs fixed.