package libasound2 1.0.25-1ubuntu10.1 [modified: usr/share/alsa/alsa.conf] failed to install/upgrade: './usr/share/alsa/alsa.conf' is different from the same file on the system

this happened while trying to install draftsight.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: libasound2 1.0.25-1ubuntu10.1 [modified: usr/share/alsa/alsa.conf]
ProcVersionSignature: Ubuntu 3.2.0-34.53-generic 3.2.33
Uname: Linux 3.2.0-34-generic x86_64
ApportVersion: 2.0.1-0ubuntu15.1
Architecture: amd64
Date: Mon Dec 17 19:53:59 2012
DuplicateSignature:
 Unpacking libasound2:i386 (from .../libasound2_1.0.25-1ubuntu10.1_i386.deb) ...
 dpkg: error processing /var/cache/apt/archives/libasound2_1.0.25-1ubuntu10.1_i386.deb (--unpack):
  './usr/share/alsa/alsa.conf' is different from the same file on the system
ErrorMessage: './usr/share/alsa/alsa.conf' is different from the same file on the system
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
SourcePackage: alsa-lib
Title: package libasound2 1.0.25-1ubuntu10.1 [modified: usr/share/alsa/alsa.conf] failed to install/upgrade: './usr/share/alsa/alsa.conf' is different from the same file on the system
UpgradeStatus: No upgrade log present (probably fresh install)