Comment 3 for bug 991990

looks like a python-gtk2 issue:

Setting up python (2.7.3-0ubuntu2) ...
Linking and byte-compiling packages for runtime python2.7...
running python rtupdate hooks for python2.7...
Updating *.pc symlinks for python-gtk2-dev...
ln: failed to create symbolic link `./pygtk-2.0.pc': File exists
error running python rtupdate hook python-gtk2-dev
dpkg: error processing python (--configure):
 subprocess installed post-installation script returned error exit status 4
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