Beyond 10.5.8 there is no POINT in it working!
The whole idea behind Leopard Webkit is to upgrade the frameworks for PowerPC LEOPARD. Not Snow Leopard or above (10.6-10.12). They already have updated WK frameworks!
So,
@apict, I am not surprised at all this is not working for you. You have Snow Leopard. Which means you have an Intel Mac and don't need it.
To everyone in general…what's with the confusion Snow Leopard users seem to be having around here lately? If you're running SL you DON'T have a PowerPC Mac! Anything Leopard is not going to work for you! I welcome early Intel Mac users (I have an SL MBP myself) but just how difficult is it to understand that there is a difference between the numbers 10.5 and 10.6?