[CENTER]Honestly... sometimes when I play a New1st quest the screen flashes a very light blue before I enter a dark room, after I exit a dark room, and when a passageway/item room is entered/exited.[/CENTER]
New1st Flashing Dark Room Entr/Exit and Passageway Warp
Known Bug, I believe it's been fixed in later betas.
It's all quests too.