Since the game is available on download already. it's a bit pointless to mention, But here it comes
There was a problem with the "sword of stone". if you take it out of the grave, and leave. the ghost would kill al the major NPC in that entire area. And you miss some important quests!
Also i remember that the camp of like 30 soldiers got possessed by that evil Imp wizard And you could kill them all of for the experience, or leave the camp. but if you kill the imp later on, that spell is still on the soldiers!