I'll ask my Debian expert to do that. I don't know which package is responsible here, and that seems to be the first step towards filing a bug report.

File against the "ftp.debian.org" pseudopackage. :)

Really? The problem arose when we were building packages for pkg.tarsnap.com, so it's a tools problem rather than an infrastructure problem...

Oh, you are using dpkg-scanpackages?

Looks like that file is being created by apt-ftparchive.

So many tools to do the same thing, huh? :) I'll look into this...