python2.3-gtk2: Undefined symbol when importing gtk

[Jean Parpaillon]

Package: python2.3-gtk2
Version: 2.5.0-0ubuntu2
Severity: grave
Justification: renders package unusable

File "/usr/lib/python2.3/site-packages/gtk-2.0/gtk/__init__.py", line 37, in ?
    from _gtk import *
ImportError: /usr/lib/python2.3/site-packages/gtk-2.0/gtk/_gtk.so: undefined symbol: gtk_cell_view_set_value


-- System Information:
Debian Release: 3.1
Architecture: i386 (i686)
Kernel: Linux 2.6.8.1-3-686
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8)

Versions of packages python2.3-gtk2 depends on:
ii  libatk1.0-0          1.9.0-0ubuntu1      The ATK accessibility toolkit
ii  libc6                2.3.2.ds1-19ubuntu4 GNU C Library: Shared libraries an
ii  libglib2.0-0         2.6.0-0ubuntu1      The GLib library of C routines
ii  libgtk2.0-0          2.6.0-1ubuntu1      The GTK+ graphical user interface 
ii  libpango1.0-0        1.8.0-0ubuntu1      Layout and rendering of internatio
ii  python2.3            2.3.4-18            An interactive high-level object-o
ii  python2.3-numeric    23.6-3ubuntu2       Numerical (matrix-oriented) Mathem

-- no debconf information