I defeated Cagnazzo, Cid shows up and I took the airship over to the left of the map, went to the Troia Infirmary, spoke to Prince Edward and found out that the Earth crystal has been stolen. Non metallic and the Dark Elf in the cave....I got it. Walk around and get on the back of the flying Chocobo and cross over the stream right in front of Troia. Get off the Chocobo, he takes off and NOW i'M STUCK ACROSS THAT RIVER! There are 2 foot bridges that don't really lead anywhere and I can't go north to the Dark Elf cave. WTF?!
They don't mention the fact that riding the Chocobo across the river means you're stuck there. I looked at a number of other sites and it isn't addressed. Something like this happened with Fallout where I got stuck in the basement and my lockpicking skill wasn't high enough to get thru the door. No big deal I just went back to the last save, but in this case the last save (before crossing over which I already saved) is 17 hours into the game so I'd lose about 5 hours of gameplay.