it seems sticky grenades sometimes stick and other times will "bounce" off of vehicles and other players especially if contact is made immediately after throwing, sometimes happens after a long distance throw though too... i have noticed what may be the problem as well....when you first throw a sticky i have noticed it is a standard grenade for a split second, and i have even seen it take form of the new promethian grenade as well for that first split second after throwing..... maybe the game isn't registering the grenade as a plasma grenade? or did you guys kinda "dumb down" the sticky grenade from it's predecessors? because even the blast radius isn't as good and the player has to be directly over it to get killed.....