Its probably always worked liked this but I only noticed it for the first time last night during "consulate docks"
I was targeting an enemy that I did not have a clear line of sight to and I got the message on screen saying "path blocked" or whatever it says. Which was fine. But when I used barrage the 6 enemys around my target took their damage. The target did not take damage as my shot to him was obstructed as I expected but I was surprised that those adjacent to him did take damage.
I did some more testing and I was doing damage to these adjacent targets even though I also didn't have a clear line to any of them either. They where all behind a wall I couldn't get round and I couldn't hit my target but I could happily hit those next to him with barrage.
I didn't think it should work this way since I should be firing 6 seperate arrows and if 1 doesn't have line of sight to the group I wouldn't expect the others to either.
Just an observation
Behaviour of Barrage
Spellforge
anshin
guided missiles?

unienaule
Even more reasons to use barrage, like you needed any.
Fury Incarnate
Indeed. Isn't it nice?
Darkpower Alchemist
Barrage is a spread of arrows,which means it should hit a general area,and not be totally focused on one opponent. If the arrows went through walls,it's a glitch,but don't look a gift horse in the mouth. Take the kills and keep it moving.
Losttoapathy
Yeah I love it when that happens...you're targeting one enemy but killing other ones around it. ^^ If you're clever as well you should be able to attack from a certain area where you can hit your enemy but your enemy is obstructed from attacking you. Depends on where you are, I guess. As much as I love barrage, there are way too many threads on it. o.O Peace out.