package libmono-microsoft-visualc10.0-cil 2.10.8.1-1ubuntu2.2 failed to install/upgrade: lectura insuficiente en buffer_copy para error en dpkg-deb durante `./usr/share/doc/libmono-microsoft-visualc10.0-cil/copyright'

I opened a terminal and I wrote sudo apt-fast update -f && sudo apt-fast upgrade -f
When it finished, in the upper right side in the desktop appeared a icon with a warning
I have cairo-dock in ubuntu 12.04

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libmono-microsoft-visualc10.0-cil 2.10.8.1-1ubuntu2.2
ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21
Uname: Linux 3.2.0-27-generic x86_64
ApportVersion: 2.0.1-0ubuntu11
Architecture: amd64
Date: Wed Jul 25 19:00:49 2012
ErrorMessage: lectura insuficiente en buffer_copy para error en dpkg-deb durante `./usr/share/doc/libmono-microsoft-visualc10.0-cil/copyright'
InstallationMedia: Ubuntu-Studio 10.10 "Maverick Meerkat" - Release amd64 (20101008)
PackageArchitecture: all
SourcePackage: mono
Title: package libmono-microsoft-visualc10.0-cil 2.10.8.1-1ubuntu2.2 failed to install/upgrade: lectura insuficiente en buffer_copy para error en dpkg-deb durante `./usr/share/doc/libmono-microsoft-visualc10.0-cil/copyright'
UpgradeStatus: Upgraded to precise on 2012-05-06 (84 days ago)