On that note I had a thing today where if I aimed at the top half of a level 3 lazerblazer with assaut's grenade launcher they went straight through, I had to aim for the stump on the ground. Never noticed that on the 360 before.
I'll give it a shot. Get it? A shot? Seriously though, I'll try to get it. Its not just lazer turrets. The hit detection is off on other ones too. I'll try to repro it.
I've seen a similar problem with the Assault's grenade launcher where it looks like a hit on my screen (I get the explosion and everything), but the server sees it as a miss (absolutely no damage; the turret's health bar doesn't even appear.) It seems to happen frequently when the Assault player is strafing. These are *direct* hits, not bounced.
Any projectile flies through the top half of the turret. I threw several air strikes at level 3 turret and they just flew past it. I'll try to remember to get a screen shot, but I don't think it'd be too hard to recreate in house.