package mount 2.17.2-3.3ubuntu4 failed to install/upgrade: subprocess new pre-installation script returned error exit status 127

[Cob @FPGLaurent]

Binary package hint: util-linux

Teminal give me :

The following packages will be upgraded:
  bsdutils computer-janitor computer-janitor-gtk empathy empathy-common jockey-common jockey-gtk libapr1 libblkid1 libcap2 libegl1-mesa libegl1-mesa-drivers libgl1-mesa-dri
  libgl1-mesa-glx libglu1-mesa libgudev-1.0-0 libperl5.10 libraw1394-11 libsdl1.2debian libsdl1.2debian-pulseaudio libsensors4 libsgutils2-2 libtextcat-data-utf8 libudev0 libuuid1 mount
  nautilus-sendto-empathy network-manager-gnome passwd perl perl-base perl-modules python-beautifulsoup software-center udev util-linux uuid-runtime
37 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/19,2 MB of archives.
After this operation, 77,8 kB of additional disk space will be used.
Do you want to continue [Y/n]?
Extracting templates from packages: 100%
Preconfiguring packages ...
(Reading database ... 197347 files and directories currently installed.)
Preparing to replace mount 2.17.2-3.3ubuntu4 (using .../mount_2.17.2-9.1ubuntu1_amd64.deb) ...
/var/lib/dpkg/tmp.ci/preinst: 49: dpkg-vendor: not found
dpkg: error processing /var/cache/apt/archives/mount_2.17.2-9.1ubuntu1_amd64.deb (--unpack):
 subprocess new pre-installation script returned error exit status 127
Errors were encountered while processing:
 /var/cache/apt/archives/mount_2.17.2-9.1ubuntu1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: mount 2.17.2-3.3ubuntu4
ProcVersionSignature: Ubuntu 2.6.38-3.30-generic 2.6.38-rc4
Uname: Linux 2.6.38-3-generic x86_64
Architecture: amd64
Date: Wed Feb 16 06:57:33 2011
DpkgTerminalLog:
 Preparing to replace mount 2.17.2-3.3ubuntu4 (using .../mount_2.17.2-9.1ubuntu1_amd64.deb) ...
 /var/lib/dpkg/tmp.ci/preinst: 49: dpkg-vendor: not found
 dpkg: error processing /var/cache/apt/archives/mount_2.17.2-9.1ubuntu1_amd64.deb (--unpack):
  subprocess new pre-installation script returned error exit status 127
ErrorMessage: subprocess new pre-installation script returned error exit status 127
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha amd64 (20110201.2)
SourcePackage: util-linux
Title: package mount 2.17.2-3.3ubuntu4 failed to install/upgrade: subprocess new pre-installation script returned error exit status 127