Seriously dev's you really need to sort out the desync no damage bug, it's worse than ever these days. 6 times in a row just now I've had it stop me from making kills and just rage quit over it. Drop 2 bricks of C4 on two Scat maxes looking the wrong way while waiting for a engineer to repair them as they had been shot to **** by my squad mates, set off the c4 NO DAMAGE DONE. Unload several clips of the NS-11c into a throng of NC that are milling around together NO DAMAGE DONE. Icing on the cake - Sneak up on an Infiltrator and stab him with my knife - First hit does some damage, the next 5 swings DOES SWEET **** ALL! Every day I have to put up with this crap, I'm getting sick of it.
PS-461 in the bug tracker is the c4 bug. I've experienced the knife thing too, it might be related. Pretty sure the gun thing is different though.