The packages file only lists clamav-base, clamav-docs, and clamav-testfiles:# grep-dctrl -s Package clamav /var/lib/apt/lists/www.backports.org_debian_dists_etch-backports_main_binary-i386_Packages
Package: clamav-base Package: clamav-docs Package: clamav-testfiles Package: wineI have refreshed the file a couple of times, and the apt signature checking is succeeding, so the problem is unlikely to be on my end.