The only 'bug' i've noticed so far is in to google maps - specifically for quest npc's and items. Some appear where they are supposed to, others appear way in the western Great Sea (even though the popup shows the correct coordinates). Also, the zoom function sometimes jumps/shifts the view over to a useless part of the map. (You know, the red box that appears when you zoom in or out) - well it works in some spots, in others it just jumps to another tile far away - so zooming to see an area is impossible depending on which area and where you started zooming from.
Yes, this is a known issue that's been a thorn in my side since I started. Some items/NPCs we just can't bubble up to the right location; they may be inside an instance inside of another instance. Haven't untangled that Gordian Knot yet. Some day...