[Aptitude-devel] Bug#706183: "WARNING: untrusted versions of the following packages will be installe vague

[Nomen Nescio]

Package: aptitude
Version: 0.6.3-3.2+squeeze1
Severity: wishlist

The following warning is too vague:

vague warning> WARNING: untrusted versions of the following packages will be installed!
vague warning>
vague warning> Untrusted packages could compromise your system's security.
vague warning> You should only proceed with the installation if you are certain that
vague warning> this is what you want to do.
vague warning>
vague warning>   libswscale0 libavutil50 libdrm-radeon1 libdrm2 libvpx0 libdrm-intel1 libpostproc51 
vague warning>
vague warning> Do you want to ignore this warning and proceed anyway?

Why is it untrusted?  Are the keys missing from the users keyring?
Are the keys present, but expired?  Are the packages signed or
unsigned?

-- Package-specific info:
aptitude 0.6.3 compiled at Aug 10 2011 23:28:10
Compiler: g++ 4.4.5
Compiled against:
  apt version 4.10.1
  NCurses version 5.7
  libsigc++ version: 2.2.4.2
  Ept support enabled.
  Gtk+ support disabled.

Current library versions:
  NCurses version: ncurses 5.7.20100313
  cwidget version: 0.5.16
  Apt version: 4.10.1
	linux-vdso.so.1 =>  (0x00007fff787ff000)
	/usr/lib/torsocks/libtorsocks.so (0x00007f7134617000)
	libapt-pkg.so.4.10 => /usr/lib/libapt-pkg.so.4.10 (0x00007f71342fd000)
	libncursesw.so.5 => /lib/libncursesw.so.5 (0x00007f71340a9000)
	libsigc-2.0.so.0 => /usr/lib/libsigc-2.0.so.0 (0x00007f7133ea4000)
	libcwidget.so.3 => /usr/lib/libcwidget.so.3 (0x00007f7133bd8000)
	libept.so.1 => /usr/lib/libept.so.1 (0x00007f7133983000)
	libxapian.so.22 => /usr/lib/libxapian.so.22 (0x00007f71335a3000)
	libz.so.1 => /usr/lib/libz.so.1 (0x00007f713338c000)
	libsqlite3.so.0 => /usr/lib/libsqlite3.so.0 (0x00007f71330f4000)
	libboost_iostreams.so.1.42.0 => /usr/lib/libboost_iostreams.so.1.42.0 (0x00007f7132ed9000)
	libpthread.so.0 => /lib/libpthread.so.0 (0x00007f7132cbd000)
	libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f71329a8000)
	libm.so.6 => /lib/libm.so.6 (0x00007f7132726000)
	libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00007f7132510000)
	libc.so.6 => /lib/libc.so.6 (0x00007f71321ad000)
	libdl.so.2 => /lib/libdl.so.2 (0x00007f7131fa9000)
	libresolv.so.2 => /lib/libresolv.so.2 (0x00007f7131d93000)
	libutil.so.1 => /lib/libutil.so.1 (0x00007f7131b8f000)
	libuuid.so.1 => /lib/libuuid.so.1 (0x00007f713198b000)
	libbz2.so.1.0 => /lib/libbz2.so.1.0 (0x00007f713177a000)
	librt.so.1 => /lib/librt.so.1 (0x00007f7131572000)
	/lib64/ld-linux-x86-64.so.2 (0x00007f7134827000)
Terminal: screen
$DISPLAY is set.
`which aptitude`: /usr/bin/aptitude
aptitude version information:

aptitude linkage:

-- System Information:
Debian Release: 6.0.7
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages aptitude depends on:
ii  apt [libapt-pkg4.10]   0.8.10.3+squeeze1 Advanced front-end for dpkg
ii  libboost-iostreams1.42 1.42.0-4          Boost.Iostreams Library
ii  libc6                  2.11.3-4          Embedded GNU C Library: Shared lib
ii  libcwidget3            0.5.16-3          high-level terminal interface libr
ii  libept1                1.0.4             High-level library for managing De
ii  libgcc1                1:4.4.5-8         GCC support library
ii  libncursesw5           5.7+20100313-5    shared libraries for terminal hand
ii  libsigc++-2.0-0c2a     2.2.4.2-1         type-safe Signal Framework for C++
ii  libsqlite3-0           3.7.3-1           SQLite 3 shared library
ii  libstdc++6             4.4.5-8           The GNU Standard C++ Library v3
ii  libxapian22            1.2.3-2           Search engine library
ii  zlib1g                 1:1.2.3.4.dfsg-3  compression library - runtime

Versions of packages aptitude recommends:
ii  apt-xapian-index              0.41       maintenance and search tools for a
pn  aptitude-doc-en | aptitude-do <none>     (no description available)
ii  libparse-debianchangelog-perl 1.1.1-2.1  parse Debian changelogs and output
ii  sensible-utils                0.0.4      Utilities for sensible alternative

Versions of packages aptitude suggests:
pn  debtags                       <none>     (no description available)
ii  tasksel                       2.88       Tool for selecting tasks for insta

-- no debconf information