Okay, this is really annoying. Every time I upload a .zip file, it ends up corrupted after a period of time. It'll work for a while, day / week / month, but eventually it dies again. I'll find some other way of posting the file, maybe on google pages or something.
Update: Okay, I loaded the .zip file off-site here. Hopefully it'll stay okay now.

Comments
Strange... even from the above link I'm getting an error:
End-of-central-directory signature not found. Either this file is not
a zipfile, or it constitutes one disk of a multi-part archive. In the
latter case the central directory and zipfile comment will be found on
the last disk(s) of this archive.