LOL this bug is very funy..
Somehow frames per second your card can render affect the shot..
I go to practice mode with kobe (ultra high 1600x1200). My FPS is ~420 and kobe cant even hit the rim with perfect release..
Then I go to settings menu and turn v-sync so that it limits my FPS to 60 and everything is normal again,,
That could mean that you guys that play it at a lower fps than 60 are not playing the same game as others