Confirmed that Ariant Station Platform does it, along with a notice informing me I am at a place where the World Map is not available. I wonder if anywhere other than Ariant is doing this?
This might be what's causing the DC: I think you're supposed to get either the World Map OR the message that the World Map isn't available, but not both at the same time.
When I open the worldmap while standing next to the Item Market NPC in Ariant, my screen becomes black and unresponsive. No message whatsoever. I then have to kill MapleRoyals through task manager. I play MapleRoyals windowed and pressing the X doesn't work while in this state.
Yes, that's my experience, too, although in my case, task manager sometimes becomes unresponsive too, and I have to force-restart my comp. =(