package clamav-getfiles 2.0-6 failed to install/upgrade: subprocess installed post-installation script returned error exit status 56

[QBall2U]

I tried to update ClamAV and got the error.

ProblemType: Package
DistroRelease: Ubuntu 11.04
Package: clamav-getfiles 2.0-6
ProcVersionSignature: Ubuntu 2.6.38-13.54-generic 2.6.38.8
Uname: Linux 2.6.38-13-generic i686
AptOrdering:
 clamav-getfiles: Configure
 amavisd-new-postfix: Configure
Architecture: i386
Date: Sun Feb 5 19:21:26 2012
ErrorMessage: subprocess installed post-installation script returned error exit status 56
InstallationMedia: Lubuntu 11.04 "Natty Narwhal" - i386 (20101203)
PackageArchitecture: all
SourcePackage: clamav-getfiles
Title: package clamav-getfiles 2.0-6 failed to install/upgrade: subprocess installed post-installation script returned error exit status 56
UpgradeStatus: No upgrade log present (probably fresh install)