Bug#372504: apt appears to download pdiffs repeatedly

[Daniel Jacobowitz <dan@debian.org>]

Package: apt
Version: 0.6.44.1
Severity: normal

I find it hard to believe that this hasn't been reported already, but I
couldn't find it anywhere... my "aptitude update" has looked like this since
pdiff support was turned on:

Get:38 2006-06-04-1349.29.pdiff [248B]
Get:39 2006-06-04-1349.29.pdiff [248B]
Get:40 2006-06-04-1349.29.pdiff [248B]
Get:41 2006-06-05-1427.58.pdiff [898B]
Get:42 2006-06-05-1427.58.pdiff [898B]
Get:43 2006-06-05-1427.58.pdiff [898B]
Get:44 2006-06-04-1349.29.pdiff [15.1kB]
Get:45 2006-06-04-1349.29.pdiff [15.1kB]
Get:46 2006-06-04-1349.29.pdiff [15.1kB]

I don't know whether it's actually making an http request for each one of
those files three times, but it definitely claims to.

-- Package-specific info:

-- (no /etc/apt/preferences present) --


-- /etc/apt/sources.list --

#deb cdrom:[Debian GNU/Linux 3.1 r0a _Sarge_ - Official amd64 Binary-1 (20050613)]/ unstable contrib main

deb http://caradoc.them.org:3142/security.debian.org/ stable/updates main contrib

## AMD64 archive - currently flaky - 20050903
#deb http://debian.csail.mit.edu/debian-amd64/debian/ unstable main contrib
#deb-src http://debian.csail.mit.edu/debian-amd64/debian/ unstable main contrib

## AMD64 archive
#deb http://mirror.espri.arizona.edu/debian-amd64/debian/ unstable main contrib
#deb-src http://mirror.espri.arizona.edu/debian-amd64/debian/ unstable main contrib

# AMD64 in the main archive!
deb http://caradoc.them.org:3142/debian-mirror.mirror.umn.edu/debian/ unstable main contrib non-free
deb-src http://caradoc.them.org:3142/debian-mirror.mirror.umn.edu/debian/ unstable main contrib non-free

# Java (Blackdown)
deb ftp://ftp.tux.org/java/debian/ sarge non-free

# Mplayer (Christian Marillat's packages)
#deb http://cyberspace.ucla.edu/marillat/ sid main
deb http://caradoc.them.org:3142/spello.sscnet.ucla.edu/marillat/ sid main

-- System Information:
Debian Release: testing/unstable
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'stable')
Architecture: amd64 (x86_64)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.17-rc2
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1)

Versions of packages apt depends on:
ii  libc6                         2.3.6-13   GNU C Library: Shared libraries
ii  libgcc1                       1:4.1.0-4  GCC support library
ii  libstdc++6                    4.1.0-4    The GNU Standard C++ Library v3

Versions of packages apt recommends:
ii  debian-archive-keyring        2006.01.18 GnuPG archive keys of the Debian a

-- no debconf information