Is it my imagination, or is ftp.uk.debian.org missing a *lot* of binary packages at the moment? I just tried updating my testing machine, and hit about 60 403's; a look at the directory listings via http://ftp.uk.debian.org/debian/pool shows that there are loads of missing files, such as libg/libgems-ruby/rubygems_1.3.2-1_all.deb. Julian