# uname -a
SunOS blade 5.10 Generic_127111-11 sun4u sparc SUNW,Sun-Blade-1000

# testparm -v -s 2>&1|grep "socket address"                                                                                          
        socket address =                                ***1***
# ps -ef |grep smbd |grep -v grep                       ***2***

# time /usr/sbin/smbd -F
real    0m0.269s                                        ***3***
user    0m0.088s
sys     0m0.081s

# cat /var/log/samba/log.smbd
...
[2008/08/13 17:41:54,  0] smbd/server.c:(1208)
  smbd version 3.2.1-16.sol10 started.
  Copyright Andrew Tridgell and the Samba Team 1992-2008
...
[2008/08/13 17:41:54,  3, pid=4323, effective(0, 0), real(0, 0)] printing/printing.c:(1397)
  start_background_queue: Starting background LPQ thread
[2008/08/13 17:41:54,  0, pid=4323, effective(0, 0), real(0, 0)] smbd/server.c:(547)
  open_sockets_smbd: No sockets available to bind to.   ***4***
[2008/08/13 17:41:54,  5, pid=4326, effective(0, 0), real(0, 0)] printing/printing.c:(1407)
  start_background_queue: background LPQ thread started ***5***
...

# ps -ef |grep smbd |grep -v grep                       ***6***
    root  4326     1   0 17:41:55 pts/1       0:00 /usr/sbin/smbd -F -d10

***1***
  The "socket address" parameter has null string
  that is invalid value for Samba 3.2 but valid for Samba 3.0.
***2***
  No output, i.e. no smbd process is running.
***3***
  Starting smbd in foreground, but aborted immediately.
***4***
  The main (parent) smbd process was aborted here.
***5***, ***6***
  The LPQ smbd process is remained.

This problem can be reproduced with "smbd -D" instead of "smbd -F",
but cannot be reproduced on CentOS 4 (i386).