When printing a gantt chart to PDF (other variants I did not
try), the WBS number left to the task name is not printed. I
could not find an option for that. (And neither the term WBS
nor work breakdown structure appear in the online help.)

This number is important for referencing in other documents,
of course.

Versions of packages planner depends on:
ii  gconf2                 2.26.0-1          GNOME configuration
database syste
ii  libart-2.0-2           2.3.20-2          Library of functions for
2D graphi
ii  libatk1.0-0            1.22.0-1          The ATK accessibility toolkit
ii  libbonobo2-0           2.24.1-1          Bonobo CORBA interfaces library
ii  libbonoboui2-0         2.22.0-1          The Bonobo UI library
ii  libc6                  2.9-7             GNU C Library: Shared libraries
ii  libcairo2              1.8.6-2+b1        The Cairo 2D vector
graphics libra
ii  libgconf2-4            2.26.0-1          GNOME configuration
database syste
ii  libgda3-3              3.0.2-5           GNOME Data Access library
for GNOM
ii  libglade2-0            1:2.6.2-1         library to load .glade
files at ru
ii  libglib2.0-0           2.20.1-1          The GLib library of C routines
ii  libgnome2-0            2.20.1.1-1        The GNOME 2 library -
runtime file
ii  libgnomecanvas2-0      2.20.1.1-1        A powerful
object-oriented display
ii  libgnomeprint2.2-0     2.18.6-1          The GNOME 2.2 print
architecture -
ii  libgnomeprintui2.2-0   2.18.4-1          GNOME 2.2 print architecture User
ii  libgnomeui-0           2.20.1.1-2        The GNOME 2 libraries
(User Interf
ii  libgnomevfs2-0         1:2.22.0-5        GNOME Virtual File System
(runtime
ii  libgtk2.0-0            2.16.1-2          The GTK+ graphical user interface
ii  libice6                2:1.0.4-1         X11 Inter-Client Exchange library
ii  liborbit2              1:2.14.13-0.1     libraries for ORBit2 - a
CORBA ORB
ii  libpango1.0-0          1.24.0-3+b1       Layout and rendering of
internatio
ii  libpopt0               1.14-4            lib for parsing cmdline
parameters
ii  libsm6                 2:1.0.3-2         X11 Session Management library