In addition to nerfing pistols, Valve have have also fixed the jump spot bug in the beta update. This jump spot bug could be performed by doing a jump-crouch-stand movement at walls slightly taller than the player model.
This bug quickly gained notoriety after BIG used it against both Cloud9 and FaZe during the PGL Major this past month. This in turn allowed BIG gain information at crucial choke points on Inferno and ultimately results in the team winning 3-0 in the group stage.