package otrs2 3.0.11+dfsg1-1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

Errors were encountered while processing:
 otrs2
 otrs
Error in function:

A fatal error occurred

Please report this as a bug and include the files
/var/log/dist-upgrade/main.log and /var/log/dist-upgrade/apt.log in
your report. The upgrade has aborted.
Your original sources.list was saved in
/etc/apt/sources.list.distUpgrade.

SystemError: E:Sub-process /usr/bin/dpkg returned an error code (1)

ERROR: hook /usr/share/apport/general-hooks/ubuntu.py crashed:
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/apport/report.py", line 718, in add_hooks_info
    symb['add_info'](self, ui)
  File "/usr/share/apport/general-hooks/ubuntu.py", line 41, in add_info
    check_attachment_for_errors(report, log)
  File "/usr/share/apport/general-hooks/ubuntu.py", line 141, in check_attachment_for_errors
    if attachment in report and re.search(grub_error, report[attachment], re.MULTILINE):
  File "/usr/lib/python2.7/re.py", line 142, in search
    return _compile(pattern, flags).search(string)
TypeError: expected string or buffer

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: otrs2 3.0.11+dfsg1-1
ProcVersionSignature: Ubuntu 3.0.0-17.30-generic 3.0.22
Uname: Linux 3.0.0-17-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.0-0ubuntu4
Architecture: i386
Date: Sat Apr 7 15:10:50 2012
ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 1
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
PackageArchitecture: all
SourcePackage: otrs2
Title: package otrs2 3.0.11+dfsg1-1 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to precise on 2012-04-07 (0 days ago)