I have read a number of blog and forum posts over the last few weeks above affiliate losing out with clickbank do to cookies failing to register or affilate hijackers stealing commission.
Most of these post were dated around last october or so I have two questions
1 Is this a real problem affecting large numbers of affiliates
2 Has it been resolved
P.S. Had some problems to day so I am running a spyware scan so I maybe a bit slow replying