python2.6 crashed with UnicodeDecodeError in <module>()

[mrl586]

Binary package hint: python2.6-minimal

1)
/usr/bin/lsb_release:81: DeprecationWarning: the sets module is deprecated
  import sets
Description: Ubuntu jaunty (development branch)
Release: 9.04

2)
python2.6-minimal:
  Asennettu: 2.6.1-0ubuntu9
  Ehdokas: 2.6.1-0ubuntu9
  Versiotaulukko:
 *** 2.6.1-0ubuntu9 0
        500 http://fi.archive.ubuntu.com jaunty/main Packages
        100 /var/lib/dpkg/status

ProblemType: Crash
Architecture: i386
Dependencies:
 libgcc1 1:4.3.3-3ubuntu5
 zlib1g 1:1.2.3.3.dfsg-12ubuntu1
 gcc-4.3-base 4.3.3-3ubuntu5
 findutils 4.4.0-2ubuntu3
 libc6 2.9-0ubuntu12
DistroRelease: /usr/bin/lsb_release:81: DeprecationWarning: the sets module is deprecated import sets Ubuntu 9.04
ExecutablePath: /usr/bin/python2.6
InterpreterPath: /usr/bin/python2.6
Package: python2.6-minimal 2.6.1-0ubuntu9
ProcCmdline: /usr/bin/python /usr/bin/gdebi-kde /home/username/Työpöytä/peazip_2.5.1.LINUX.GTK2-2_i386.deb
ProcEnviron:
 LANGUAGE=fi_FI:fi:en_GB:en
 LANG=fi_FI.UTF-8
 SHELL=/bin/bash
PythonArgs: []
SourcePackage: python2.6
Title: python2.6 crashed with UnicodeDecodeError in <module>()
Traceback:
 Traceback (most recent call last):
   File "/usr/bin/gdebi-kde", line 100, in <module>
     afile = unicode(afile, 'utf-8')
 UnicodeDecodeError: 'utf8' codec can't decode bytes in position 15-18: invalid data
Uname: Linux 2.6.28-8-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare