Just got the realbot code in the CVS server but...
in cNodeMachine::add function (hmmm, maybe that cNodeMachine means more a char variable called NodeMachine, the class name may should be CNodeMachine)
Code:
// record jumping
if (pEntity->v.button & IN_JUMP); // what's this ; ?
Nodes[index].iNodeBits |= BIT_JUMP;