after you check the fork....if its ok, back to the fingers. I have seen one press plate that was so far off adjustment that this was the symptom. If yours is adjusted that far off, when looking at them, they will form an inverted cone pointing at the clutch plate. Properly adjusted, they form an almost flat plane that parallels the top of the pressure plate housing. The distance from that top should be from 5/8ths to 11/16ths inch.
heres probably more than you want to know:
http://www.ahooga.com/notebook/howto/1/howto1.shtml