Here is where I am currently stuck. It's a bit of a laundry list:
Xaafi Desert - I have the 3 Old Fragments from the temple. The instruction from Tetzek was to come out immediately and meet him in Drakeland. I don't know where that is. The signpost in the Desert says go north but there is no north exit from the map. It says Tainted River is West and I assume that is past the gate in the southwest which I can't open.
Xaafi Temple - I was warned not to provoke the priests or it would ruin the quest, but should I make them attack me sometime later in the game?
Edit - I figured out this next part:
Obanyon book - I found the cave where Obanyon is written on the wall, and I have a book called Obanyon. An earlier hint in the forum says take the book to an NPC on the coast near Mt. Khand, but the only NPC there is the dwarf talking about the boat to the City. There is a tiny door inside a small cave but if he is in there I can't open it yet. Further north on the map there is a barred gate past the 5 cubes puzzle. Perhaps the NPC is past that gate but I can't open it.
Obanyon entrance - I know the answer to the riddle
but what item matches this answer?
Styr Jungle - the barred gate in the southeast by the hidden lizardman. Can't find any switch. Is it buried in the bushes somewhere?
Ice Caverns after Gwain's cave - barred gate in the west.
Glacier Caves - tapestry with 2 trees and the sun/moon. Should I do something there?
Edit - I progressed on the Underground quest, got as far as visiting the cellar of the Black Pearl and seeing an odd painting on the back of one of the kegs, but I seem to be at a dead end now. Not sure what to do with a boarding pass.
Archery Range - I think I am missing something here as shooting arrows is not doing anything. Should I talk to the rat and make him vanish? I haven't wanted to do that in case it broke the quest.
Edit - I'm ok on this now - the recipes are incomplete but once I guessed the missing item mithril ore did indeed work.
Mithril Rock - Needed for Dwarven armour - I have lots of mithril ore but they don't work. Where are mithril rocks?
Moonstone - hint on where to look?
Gem of the Architect - I handed it to the dwarf forgemaster who told me now I can enchant armour but he didn't tell me how to do it.
Pirate Base - "the more it grows the less you see" - I have tried a Dark Bomb, Star Bomb, Fire Bomb, Torch - I'm thinking the answer is Light or Dark - can't find the right item yet though.
Any help appreciated if someone has the time to reply!