Crystallex only has control over what they say and do. If they are negotiating with any other entity be it a miner or VZ, they have no control over what those entities say or do or leak.
SEC rules are tough and KRY must protect itself. Fung has been less than informative to shareholders so I really can't see him "leaking" anything.
If there is a "leak" of anything it is likely from one of the other parties. If that is a premature leak in anticipation of what this entity "thinks" will occur, then KRY is still in the right to say they have no knowledge of any material developments. They may know 100% what the probable "leak" is but until it becomes a material event this is the right answer.
I've been very critical of mgt but in this I think we need to give them some room and trust.