Rar2John - Salt w/0000000000000000

Hello -

Sorry if this is a dumb question, but I've never run across this...

I'm working on a RAR file (with headers encrypted), and I'm seeing (what I believe to be the) salt from rar2john that I haven't seen before, and wanted to ask folks for their thoughts.  I've tested with numerous versions of rar going back a few years, but haven't been able to reproduce.

FILENAME:$RAR3$*0*0000000000000000*0d7...<normal rar2john output>

Anyone else see this before?

Thanks,

ag