The vision eye doesn't recognice black shelled paint.
The latest version of the cricket board (digital eye) might sort out the problems you're having with the split shell.
like paul said the cricket MIGHT solve the black/dark/split shelled paint problem with the vision but i havent seen any proof of this...mostly its just that people either have the problem or dont have it...
easiest way to get rid of it is to not shoot black/dark/split shelled paint!
although split shelled is fine if it bright color!
the new cricket board does see black shelled paint but not very well, it takes a minuete to decided if a ball is there or not!!!! its fine if you dont mind shooting about 4bps any faster and it struggles a bit..