Torchlight install error on Ubuntu 12.04 64bit

Yesterday I tried to update Torchlight with update manager but I got an error after downloaded. I tried to uninstall it and then install again with software center, this is what I get:

massi@ClearPower:~$ software-center
2012-10-03 11:38:47,607 - softwarecenter.ui.gtk3.app - INFO - setting up proxy 'None'
2012-10-03 11:38:47,611 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True
2012-10-03 11:38:47,890 - softwarecenter.backend.reviews - WARNING - Could not get usefulness from server, no username in config file
2012-10-03 11:38:47,961 - softwarecenter.ui.gtk3.app - INFO - show_available_packages: search_text is '', app is None.
2012-10-03 11:38:48,078 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
2012-10-03 11:38:53,482 - softwarecenter.ui.gtk3.app - INFO - software-center-agent finished with status 0
2012-10-03 11:38:53,483 - softwarecenter.db.database - INFO - reopen() database
2012-10-03 11:38:53,483 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True
2012-10-03 11:38:53,905 - softwarecenter.db.database - INFO - reopen() database
2012-10-03 11:38:53,906 - softwarecenter.db.database - INFO - open() database: path=None use_axi=True use_agent=True

(software-center:2141): Gtk-CRITICAL **: gtk_icon_set_render_icon_pixbuf: assertion `icon_set != NULL' failed

(software-center:2141): Gtk-CRITICAL **: gtk_icon_set_render_icon_pixbuf: assertion `icon_set != NULL' failed
debconf: DbDriver "passwords" warning: could not open /var/cache/debconf/passwords.dat: Permesso negato
debconf: DbDriver "passwords" warning: could not open /var/cache/debconf/passwords.dat: Permesso negato
debconf: DbDriver "passwords" warning: could not open /var/cache/debconf/passwords.dat: Permesso negato
debconf: DbDriver "passwords" warning: could not open /var/cache/debconf/passwords.dat: Permesso negato
2012-10-03 11:39:05,955 - softwarecenter.backend - ERROR - error in _on_trans_finished 'Errore: Operazione di pacchetto non riuscita
Installazione o la rimozione di un pacchetto software non riuscita.

(Reading database ... 279157 files and directories currently installed.)
Unpacking torchlight (from .../torchlight_1.0+2012+09+26-0ubuntu1_amd64.deb) ...
dpkg: error processing /var/cache/apt/archives/torchlight_1.0+2012+09+26-0ubuntu1_amd64.deb (--unpack):
 trying to overwrite '/usr/share/icons/hicolor/48x48/apps/torchlight.png', which is also in package torchlight-bin:i386 1.0+2012+09+18a-0ubuntu1
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Processing triggers for hicolor-icon-theme ...
Errors were encountered while processing:
 /var/cache/apt/archives/torchlight_1.0+2012+09+26-0ubuntu1_amd64.deb
'
2012-10-03 11:39:16,776 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
2012-10-03 11:39:17,140 - softwarecenter.db.pkginfo_impl.aptcache - INFO - aptcache.open()
massi@ClearPower:~$

I manually removed the file '/usr/share/icons/hicolor/48x48/apps/torchlight.png' and tried again, but nothing changed, the error message is the same.
Is it my system to have a problem? or is this package to be broken?
Is there anyone with the same problem there?