When I kill enemies with the flamethrower they're very frequently explode into a bunch of health, mana, and ammo pickups, way more than when I kill them with any other weapon. I have the perk for more loot from enemies, but since it's *just* the flamethrower and not any other weapon (including the flare gun) I think it's a bug. I'm using the 1.0.3.1 patch currently.