pedrored: I've been doing a little digging. Every page I find with Ataxx rules specifies a square area that you can jump to, so it includes the knight-type jump.
Seems like the rules were not entirely correctly interpreted when it was implemented here but that's for Fencer to say something about and correct if that's the case.

Since you've played this before, what's your oppinion about the difference in the rules? Does it make the game easier, harder, more biased towards one of the players...?