Hey! This is an odd "exploit" one of my Players alerted me too last Sunday while the party was exploring a dungeon map using Dynamic Lighting.
The player (using Firefox/Windows7) would rapidly use his mouse-wheel to scroll vertically, the Dynamic Lighting on the map would remove temporarily allowing him to see the full map for maybe 1-2 seconds before the lighting re-appeared.
I regrettably don't have screen shots of this and hope to try and replicate this tonight but my Players were able to identify tokens that were on my screen, still on parts of the map they shouldn't have been able to see after testing this process out on their own.
I've fixed this by placing tokens on the GM layer (which I'm seeing more posts saying this is a best-practice) however this slows down "reveals" using light to a degree as I need to then quickly move these tokens back to the Token
I thought I'd make a post to see if anyone else is experiencing this.