Yes, I thought it was a binary thing too, but I'm not a programmer. Maybe it's one of those Brit/US cultural differences like date formats...
Anyway, there is something seriously screwed up with the DLS which must be contributing to the 'missing assets' problem.
I had always assumed that Content Manager reflected what's on the 'Black Page' DLS once it had caught up with updates. However I am now certain it doesn't. The following kuids (a Volvo wheel loader by Swedish creator Sealpower) are examples of some TS2009 assets that are on the Black Pages, but I can only get by FTP, one asset at a time.
For me (maybe only me?) Download Helper and CM just don't recognize these kuids. Why?
I've activated a new First Class Ticket and done a database repair, and can even download more recent assets by the same author using CM, but the above kuids are still 'unknown' to my CM.