This is present in 9.04 as well:
# pstree -Alap 5905 dpkg,5905 --force-confnew --status-fd 29 --configure perl perl-modules binutils debsums libdevkit-gobject0 libudev0 devicekit dialog gawk dpkg-awk make dpkg-dev e2tools ethtool ftplib3 gcc-4.3 gcc hal-info libsmbios2libhal `-frontend,9880 -w /usr/share/debconf/frontend /var/lib/dpkg/info/wu-ftpd.postinst configure `-(wu-ftpd.postins,9887)
9880 pts/1 S<+ 0:00 /usr/bin/perl -w /usr/share/debconf/frontend /var/lib/dpkg/info/wu-ftpd.postinst configure 9887 pts/1 Z<+ 0:00 [wu-ftpd.postins] <defunct>
This is present in 9.04 as well:
# pstree -Alap 5905 debconf/ frontend /var/lib/ dpkg/info/ wu-ftpd. postinst configure -(wu-ftpd. postins, 9887)
dpkg,5905 --force-confnew --status-fd 29 --configure perl perl-modules binutils debsums libdevkit-gobject0 libudev0 devicekit dialog gawk dpkg-awk make dpkg-dev e2tools ethtool ftplib3 gcc-4.3 gcc hal-info libsmbios2libhal
`-frontend,9880 -w /usr/share/
`
9880 pts/1 S<+ 0:00 /usr/bin/perl -w /usr/share/ debconf/ frontend /var/lib/ dpkg/info/ wu-ftpd. postinst configure
9887 pts/1 Z<+ 0:00 [wu-ftpd.postins] <defunct>