package netatalk 2.2.1-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 255

The crash report just showed up on my taskbar.

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: netatalk 2.2.1-1
ProcVersionSignature: Ubuntu 3.2.0-25.40-generic 3.2.18
Uname: Linux 3.2.0-25-generic x86_64
NonfreeKernelModules: openafs
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
Date: Sat Jun 16 07:47:52 2012
DuplicateSignature:
 Setting up netatalk (2.2.1-1) ...
 Starting Netatalk services (this will take a while): cnid_metadcnid_metad is already running (pid = 2407), or the lock file is stale.
 invoke-rc.d: initscript netatalk, action "start" failed.
 dpkg: error processing netatalk (--configure):
  subprocess installed post-installation script returned error exit status 255
ErrorMessage: subprocess installed post-installation script returned error exit status 255
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
SourcePackage: netatalk
Title: package netatalk 2.2.1-1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 255
UpgradeStatus: Upgraded to precise on 2012-05-25 (23 days ago)