hpoj package recomends hpijs, which uninstalls hpoj (karmic)

[Daniel]

Binary package hint: hpoj

I have hpoj installed.
I go to synaptic, find hpoj, selected "Marcar recomendados para instalación" (=~ Mark recommended installations) => hpijs
then a window appears:
  ("Para ser desinstalado") To uninstall: hpoj hpoj-xojpanel
  ("Para ser instalado") To install: hpijs

I expect to have installed both, hpoj and hpijs, in order to print with a HP Deskjet F2420
Probably a version or dependence mismatch

------------------
$ LANG=en sudo apt-get install hpijs
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  libqt3-mt libaudio2
Use 'apt-get autoremove' to remove them.
The following extra packages will be installed:
  hplip
Suggested packages:
  hpijs-ppds hplip-doc hplip-gui
The following packages will be REMOVED:
  hpoj hpoj-xojpanel
The following NEW packages will be installed:
  hpijs hplip
0 upgraded, 2 newly installed, 2 to remove and 0 not upgraded.
Need to get 713kB of archives.
After this operation, 1020kB of additional disk space will be used.
Do you want to continue [Y/n]? n
Abort.

$ LANG=en sudo apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
------------------

$ LANG=en lsb_release -rd
Description: Ubuntu 9.10
Release: 9.10

$ LANG=en apt-cache policy hpoj hpijs
hpoj:
  Installed: 0.91-14.1
  Candidate: 0.91-14.1
  Version table:
 *** 0.91-14.1 0
        500 http://ftp.rnl.ist.utl.pt karmic/universe Packages
        100 /var/lib/dpkg/status
hpijs:
  Installed: (none)
  Candidate: 3.9.8-1ubuntu2
  Version table:
     3.9.8-1ubuntu2 0
        500 http://ftp.rnl.ist.utl.pt karmic/main Packages

ProblemType: Bug
Architecture: i386
Date: Sat Nov 28 14:54:23 2009
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Package: hpoj 0.91-14.1
ProcEnviron:
 LANG=es_ES.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-15.50-generic
SourcePackage: hpoj
Uname: Linux 2.6.31-15-generic i686
XsessionErrors:
 (gnome-settings-daemon:1936): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:1936): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (polkit-gnome-authentication-agent-1:2026): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (nautilus:2005): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed