package software-center 13.10-0ubuntu4.1 failed to install/upgrade: il sottoprocesso nuovo script pre-removal ha restituito lo stato di errore 1

Traceback (most recent call last):
  File "/usr/lib/python2.7/site.py", line 563, in <module>
    main()
  File "/usr/lib/python2.7/site.py", line 545, in main
    known_paths = addusersitepackages(known_paths)
  File "/usr/lib/python2.7/site.py", line 272, in addusersitepackages
    user_site = getusersitepackages()
  File "/usr/lib/python2.7/site.py", line 247, in getusersitepackages
    user_base = getuserbase() # this will also set USER_BASE
  File "/usr/lib/python2.7/site.py", line 237, in getuserbase
    USER_BASE = get_config_var('userbase')
  File "/usr/lib/python2.7/sysconfig.py", line 578, in get_config_var
    return get_config_vars().get(name)
  File "/usr/lib/python2.7/sysconfig.py", line 505, in get_config_vars
    import re
  File "/usr/lib/python2.7/re.py", line 1
SyntaxError: Non-ASCII character '\xee' in file /usr/lib/python2.7/re.py on line 1, but no encoding declared; see http://www.python.org/peps/pep-0263.html for details

ProblemType: Package
DistroRelease: Ubuntu 14.04
Package: software-center 13.10-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3.4
AptOrdering:
 software-center: Install
 classicmenu-indicator: Configure
 software-center: Configure
Architecture: i386
Date: Tue Sep 16 13:59:38 2014
DuplicateSignature: package:software-center:13.10-0ubuntu4.1:il sottoprocesso nuovo script pre-removal ha restituito lo stato di errore 1
ErrorMessage: il sottoprocesso nuovo script pre-removal ha restituito lo stato di errore 1
InstallationDate: Installed on 2014-08-18 (28 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release i386 (20140722.2)
PackageArchitecture: all
SourcePackage: software-center
Title: package software-center 13.10-0ubuntu4.1 failed to install/upgrade: il sottoprocesso nuovo script pre-removal ha restituito lo stato di errore 1
UpgradeStatus: No upgrade log present (probably fresh install)