Uh-oh... does that mean you're not helping us crush Vipers on Monday?
Where did the fork break? If I had to guess, it would either be at the fulcrum point or at the throwout bearing.
In either case, my opinion would be that the throwout bearing is goofy in its construction. Though, if it's the ZF-6, I think it's integrated with the pressure plate.
I doubt that there is an issue with the slave cylinder and it's function, though, again, I would venture a guess that it may be possible to over extend it's action and break parts further down the food chain...