$ aptitude -Ds install udev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Reading extended state information      
Initializing package states... Done
Reading task descriptions... Done  
The following packages are BROKEN:
  libc6-dev (D: libc6)  libc6-i386 (D: libc6)  util-linux-locales (D: util-linux)  
The following NEW packages will be installed:
  libc-bin{a} (D: libc6)  libdpkg-perl{a} (D: dpkg-dev)  libltdl7{a} (D: libgphoto2-2, D: libgphoto2-port0)  
  liblzma2{a} (D: xz-utils)  libudev0{a} (D: udev)  libv4l-0{a} (D: libsane)  
  xz-utils{a} (P: dpkg, D: dpkg-dev, R: libdpkg-perl, S: tar)  
The following packages will be REMOVED:
  dosfstools{u}  ghostscript-x{u} (D: gs)  gs{u}  libapt-pkg-perl{u}  libfreebob0{u}  libltdl3-dev{u}  libt1-5{u}  libxtrap6{u}  
  mtools{u}  openssl-blacklist{u}  oss-compat{u}  tp-smapi-modules-2.6.26-1-amd64{u}  xutils-dev{u}  
The following packages will be upgraded:
  dpkg  dpkg-dev  libc6  libgphoto2-2  libgphoto2-port0  libsane  locales  udev  util-linux  
The following packages are RECOMMENDED but will NOT be installed:
  fakeroot (R: dpkg-dev)  libalgorithm-merge-perl (R: dpkg-dev)  sane-utils (R: libsane)  
9 packages upgraded, 7 newly installed, 13 to remove and 486 not upgraded.
Need to get 21.8MB of archives. After unpacking 10.2MB will be freed.
The following packages have unmet dependencies:
  libc6-i386: Depends: libc6 (= 2.7-18lenny7) but 2.11.3-2 is to be installed.
  libc6-dev: Depends: libc6 (= 2.7-18lenny7) but 2.11.3-2 is to be installed.
  util-linux-locales: Depends: util-linux (< 2.13.1.1.0-0) but 2.17.2-9 is to be installed.
The following actions will resolve these dependencies:

Install the following packages:
gcc-4.4-base [4.4.5-8 (stable)]
lib32bz2-1.0 [1.0.5-6+squeeze1 (stable)]
lib32v4l-0 [0.8.0-1 (stable)]
libc-dev-bin [2.11.3-2 (stable)]

Upgrade the following packages:
binutils [2.18.1~cvs20080103-7 (now) -> 2.20.1-16 (stable)]
ia32-libs [2.7+lenny4 (now) -> 20120102 (stable)]
ia32-libs-gtk [2.7+lenny1 (now) -> 20120102 (stable)]
lib32asound2 [1.0.16-2 (now) -> 1.0.23-2.1 (stable)]
lib32gcc1 [1:4.3.2-1.1 (now) -> 1:4.4.5-8 (stable)]
lib32ncurses5 [5.7+20081213-1 (now) -> 5.7+20100313-5 (stable)]
lib32stdc++6 [4.3.2-1.1 (now) -> 4.4.5-8 (stable)]
lib32z1 [1:1.2.3.3.dfsg-12 (now) -> 1:1.2.3.4.dfsg-3 (stable)]
libasound2 [1.0.16-2 (now) -> 1.0.23-2.1 (stable)]
libasound2-dev [1.0.16-2 (now) -> 1.0.23-2.1 (stable)]
libc6-dev [2.7-18lenny7 (now) -> 2.11.3-2 (stable)]
libc6-i386 [2.7-18lenny7 (now) -> 2.11.3-2 (stable)]
libstdc++6 [4.3.2-1.1 (now) -> 4.4.5-8 (stable)]
util-linux-locales [2.13.1.1-1 (now) -> 2.17.2-9 (stable)]

Score is 399

Accept this solution? [Y/n/q/?] y
The following NEW packages will be installed:
  gcc-4.4-base{a} (D: lib32gcc1, D: lib32stdc++6, D: libstdc++6)  lib32bz2-1.0{a} (D: ia32-libs)  lib32v4l-0{a} (D: ia32-libs)  
  libc-bin{a} (D: libc6)  libc-dev-bin{a} (D: libc6-dev)  libdpkg-perl{a} (D: dpkg-dev)  
  libltdl7{a} (D: libgphoto2-2, D: libgphoto2-port0)  liblzma2{a} (D: xz-utils)  libudev0{a} (D: udev)  
  libv4l-0{a} (D: lib32v4l-0, D: libsane)  xz-utils{a} (P: dpkg, D: dpkg-dev, R: libdpkg-perl, S: tar)  
The following packages will be REMOVED:
  dosfstools{u}  ghostscript-x{u} (D: gs)  gs{u}  libapt-pkg-perl{u}  libfreebob0{u}  libltdl3-dev{u}  libt1-5{u}  libxtrap6{u}  
  lsb-release{u} (D: ia32-libs)  mtools{u}  openssl-blacklist{u}  oss-compat{u}  tp-smapi-modules-2.6.26-1-amd64{u}  xutils-dev{u}  
The following packages will be upgraded:
  binutils  dpkg  dpkg-dev  ia32-libs  ia32-libs-gtk  lib32asound2  lib32gcc1  lib32ncurses5  lib32stdc++6  lib32z1  libasound2  
  libasound2-dev  libc6  libc6-dev  libc6-i386  libgphoto2-2  libgphoto2-port0  libsane  libstdc++6  locales  udev  util-linux  
  util-linux-locales  
The following packages are RECOMMENDED but will NOT be installed:
  fakeroot (R: dpkg-dev)  libalgorithm-merge-perl (R: dpkg-dev)  sane-utils (R: libsane)  
23 packages upgraded, 11 newly installed, 14 to remove and 472 not upgraded.
Need to get 85.1MB of archives. After unpacking 14.3MB will be used.
Do you want to continue? [Y/n/?] y
Would download/install/remove packages.