I don't think he was actually missing any fingers.
One of his hands was half paralysed though, causing his weird claw like playing style due to being unable to use two of his fingers.
(
Jeru War and Piss,
Tue 10 Mar 2009, 16:58,
archived)
Django Beadle?
yes i think you are right
edit - according to the internets the fingers were like that due to the tendons shrinking in a fire than nearly killed him
(
boff FL OZ,
Tue 10 Mar 2009, 17:06,
archived)