Hi, I dunno if this is the right place and if you already fixed this, and sorry if this is not the way to report a bug (I don't have the time to RTFM, I just want to do a quick install). Anyways, here's my two cents: I got this message when trying to install zope-exuserfolder (0.10.10-5), (and related stuff) using debian's dselect utlility on a debian 2.4.18-bf2.4 unstable: : Setting up zope-cmfplone (1.0.5.20030909-2) ... postinst cannot determine the version of python used in /usr/sbin/zope-z2 ... please file a bug report. dpkg: error processing zope-cmfplone (--configure): subprocess post-installation script returned error exit status 1 dpkg: dependency problems prevent configuration of plone: plone depends on zope-cmfplone (= 1.0.5.20030909-2); however: Package zope-cmfplone is not configured yet. dpkg: error processing plone (--configure): dependency problems - leaving unconfigured Setting up zope-exuserfolder (0.10.10-5) ... postinst cannot determine the version of python used in /usr/sbin/zope-z2 ... please file a bug report. dpkg: error processing zope-exuserfolder (--configure): subprocess post-installation script returned error exit status 1 Errors were encountered while processing: zope-cmfplone plone zope-exuserfolder E: Sub-process /usr/bin/dpkg returned an error code (1) Some errors occurred while unpacking. I'm going to configure the packages that were installed. This may result in duplicate errors or errors caused by missing dependencies. This is OK, only the errors above this message are important. Please fix them and run [I]nstall again Press enter to continue. : The problem seems to come from /usr/sbin/zope-z2 in this (only) line: exec python2.2 -O /usr/lib/zope/z2.py $@ should be: exec /usr/bin/python2.2 -O /usr/lib/zope/z2.py $@ based on the regular expression from postinst located at: /var/lib/dpkg/info/zope-exuserfolder.postinst After that it works fine. Regards, Federico.