Woo Hoo! Empty zip files get you a cpgz...
I have just downloaded some software from the D-Link website, knowing full well I would hate it (why, when I keep vowing never again, do I keep buying their stuff?)
Anyway, it is late 2010 and still, this seems to be a write-only format.
--- No, wait up - we have a breakthrough...
The D-Link download site is providing empty files. I am getting zero-byte files with a .zip extension.
When I try to uncompress, I get a file with a cpgz extension... and when I unpack that, I get the zip back. This is why it looks like it is going in a circle, but it is not the circle we think it is.
I guess that Archiver sees the empty zip and packs it as a cpgz because someone at Apple has a sick sense of humour. The D-Link guys are pretty funny too...