Haven't figured a rhyme or reason, but *some* print jobs vanish when spooled thru samba.
2k3 server spooling thru samba, 2 out of ten jobs may vanish.
Opened up cups:631 and spool directly to cups, jobs no-longer vanish.
It's often easy enough to re-spool the job, I suppose, but this is not acceptable.
Please read https://www.samba.org/~asn/reporting_samba_bugs.txt
I expect this bug may be a duplicate of bug 10808. The background print process fails to pull newly submitted print jobs from the CUPS queue, and as a result removes them from the local spoolss queue.
The bug appears to be due to a CUPS regression. I'll add further details and a patch to 10808.