sorry mojo - it was 2 in the morning...
/var/log/cups/error_log
E [20/Jan/2012:12:37:42 +0000] Unable to open listen socket for address ::1:631 - Address family not supported by protocol.
/var/log/cups/error_log with LogLevel debug
:12:40:35 +0000] Listening to ::1:631 (IPv6)
I [20/Jan/2012:12:40:35 +0000] Listening to 127.0.0.1:631 (IPv4)
I [20/Jan/2012:12:40:35 +0000] Listening to /var/run/cups/cups.sock (Domain)
I [20/Jan/2012:12:40:35 +0000] Remote access is disabled.
D [20/Jan/2012:12:40:35 +0000] Added auto ServerAlias slitaz
I [20/Jan/2012:12:40:35 +0000] Loaded configuration file "/etc/cups/cupsd.conf"
I [20/Jan/2012:12:40:35 +0000] Using default TempDir of /var/spool/cups/tmp...
I [20/Jan/2012:12:40:35 +0000] Configured for up to 100 clients.
I [20/Jan/2012:12:40:35 +0000] Allowing up to 100 client connections per host.
I [20/Jan/2012:12:40:35 +0000] Using policy "default" as the default!
I [20/Jan/2012:12:40:35 +0000] Full reload is required.
I [20/Jan/2012:12:40:35 +0000] Loaded MIME database from "/usr/share/cups/mime" and "/etc/cups": 35 types, 42 filters...
D [20/Jan/2012:12:40:35 +0000] Loading printer Canon...
D [20/Jan/2012:12:40:35 +0000] load_ppd: Loading /var/cache/cups/Canon.ipp4...
D [20/Jan/2012:12:40:35 +0000] cupsdRegisterPrinter(p=0xb78317e0(Canon))
I [20/Jan/2012:12:40:35 +0000] Loading job cache file "/var/cache/cups/job.cache"...
D [20/Jan/2012:12:40:35 +0000] [Job 1] Loading from cache...
I [20/Jan/2012:12:40:35 +0000] Full reload complete.
D [20/Jan/2012:12:40:35 +0000] cupsd_clean_files(path="/var/spool/cups/tmp", pattern="(null)")
I [20/Jan/2012:12:40:35 +0000] Cleaning out old files in "/var/spool/cups/tmp"...
D [20/Jan/2012:12:40:35 +0000] cupsd_clean_files(path="/var/cache/cups", pattern="*.ipp")
I [20/Jan/2012:12:40:35 +0000] Cleaning out old files in "/var/cache/cups"...
E [20/Jan/2012:12:40:35 +0000] Unable to open listen socket for address ::1:631 - Address family not supported by protocol.
I [20/Jan/2012:12:40:35 +0000] Listening to 127.0.0.1:631 on fd 4...
I [20/Jan/2012:12:40:35 +0000] Listening to /var/run/cups/cups.sock on fd 6...
I [20/Jan/2012:12:40:35 +0000] Resuming new connection processing...
D [20/Jan/2012:12:40:35 +0000] cupsdRegisterPrinter(p=0xb78317e0(Canon))
D [20/Jan/2012:12:40:35 +0000] Discarding unused server-started event...
D [20/Jan/2012:12:40:36 +0000] Report: clients=0
D [20/Jan/2012:12:40:36 +0000] Report: jobs=1
D [20/Jan/2012:12:40:36 +0000] Report: jobs-active=0
D [20/Jan/2012:12:40:36 +0000] Report: printers=1
D [20/Jan/2012:12:40:36 +0000] Report: printers-implicit=0
D [20/Jan/2012:12:40:36 +0000] Report: stringpool-string-count=17640
D [20/Jan/2012:12:40:36 +0000] Report: stringpool-alloc-bytes=12344
D [20/Jan/2012:12:40:36 +0000] Report: stringpool-total-bytes=327608
and I add the file as attachment, when I make a printjob