Call of Duty 4 Beta... tragically flawed.

At first glance, the Call of Duty 4 Beta seemed near perfect. But after a few days of playing, I've finally found out a pretty big "chip in the paint". When shooting at an opponent, sometimes nothing hits him. Even though the cross hairs are on him. In the Kill-Cam, it shows me not even aiming at him. It's just super frustrating. If this error is also in the full version of the game, I might not purchase it.