gourmet crashed with ValueError in _compile()

[Wolfgang Hasleder]

Binary package hint: gourmet

Ubuntu 9.04

Gourmet version 0.14.5-2ubuntu1

gourmet crashes when it is starting

wolfgang@wolfgang-heimwolf:~$ python2.6 /usr/bin/gourmet
/usr/share/gourmet/gourmet/gtk_extras/thumbnail.py:1: DeprecationWarning: the md5 module is deprecated; use hashlib instead
  import Image, urllib, md5, os.path, os, StringIO
Traceback (most recent call last):
  File "/usr/bin/gourmet", line 13, in <module>
    from gourmet.OptionParser import *
  File "/usr/share/gourmet/gourmet/__init__.py", line 12, in <module>
    import convert
  File "/usr/share/gourmet/gourmet/convert.py", line 754, in <module>
    FRACTION_MATCHER = re.compile(NUM_AND_FRACTION_REGEXP,re.UNICODE)
  File "/usr/lib/python2.6/re.py", line 190, in compile
    return _compile(pattern, flags)
  File "/usr/lib/python2.6/re.py", line 238, in _compile
    raise ValueError('Cannot process flags argument with a compiled pattern')
ValueError: Cannot process flags argument with a compiled pattern

ProblemType: Crash
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/gourmet
InterpreterPath: /usr/bin/python2.6
Package: gourmet 0.14.5-2ubuntu1
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/gourmet
ProcEnviron:
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
PythonArgs: ['/usr/bin/gourmet']
SourcePackage: gourmet
Title: gourmet crashed with ValueError in _compile()
Uname: Linux 2.6.28-11-generic i686
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare