FC5 Starting CUPS [failed] -- how to debug / fix?

[Tony Nelson]

I upgraded my working FC3 to FC5.  During boot, starting CUPS fails.
"service cups status" shows cupsd is stopped, and there's nothing at
localhost:631.  Localhost is defined (I can ping it).  "service cups start"
fails.  I don't see anything relevent about CUPS in dmesg or
/var/log/messages.  The only log I can find that seems to refer to cups
starting is /var/log/cups/error_log, and its shows:

I [17/Apr/2006:12:27:28 -0400] Listening to 0:631
I [17/Apr/2006:12:27:28 -0400] Listening to 7f000001:631
I [17/Apr/2006:12:27:28 -0400] Loaded configuration file "/etc/cups/cupsd.conf"
I [17/Apr/2006:12:27:28 -0400] Configured for up to 100 clients.
I [17/Apr/2006:12:27:28 -0400] Allowing up to 100 client connections per host.
I [17/Apr/2006:12:27:28 -0400] Full reload is required.
I [17/Apr/2006:12:27:28 -0400] LoadPPDs: Read "/etc/cups/ppds.dat", 1286 PPDs...
I [17/Apr/2006:12:27:28 -0400] LoadPPDs: No new or changed PPDs...
I [17/Apr/2006:12:27:28 -0400] Full reload complete.
E [17/Apr/2006:12:27:28 -0400] StartListening: Unable to bind socket for address 7f000001:631 - Address already in use.

I don't see what is using that address with lsof.  I suppose it is a UNIX
domain socket.  I don't know if that is the problem.

What should I do now?
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