save exhibiting 2 bugs:
1) 2 crow men that died early on are shown to be missing, even though their corpses are in plain sight, I think they were even brought to the refuse pile, and a lot of dwarves were horrified when they saw it.

2) the caravan just suddenly left, their wagons and items disappearing without a trace. Not sure if they actually arrived with merchants or without, but I know they didn't arrive with an outpost liaison.