Here is an anonymous unofficial answer I have received at JavaOne, by someone really really close to the certification and knows about grading.
Basically if you get 44/80 means that the locking does not work in all cases. That there is a scenario that the examiners have run that shows the locking schema that you use does not fully lock in all concurrent scenarios.
[ October 13, 2004: Message edited by: Nicky Bodentien ]
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