Gothic II: Gold Classic
Xeres' Return
Inventory trading bug
Some quest items crash the game if they're in your inventory while trading.
So far i have found these:
-piece of meat from scavenger in khorata found in a cave
-amulet from Jim the orc
-stone ring pieces that are used to open the portal to Jhanrkendar
-stone ring that opens the portal
-note from bandits that work for Canthar
Dropping these items before trading is a workaround.