On Debian machines smbd needs append rights for samba logfiles.
--- /usr/src/refpolicy-20071214/policy/modules/services/samba.te 2007-12-14 15:23:18.000000000 +0100 +++ policy/modules/services/samba.te 2008-02-03 10:02:54.000000000 +0100 @@ -223,6 +223,7 @@ create_dirs_pattern(smbd_t,samba_log_t,samba_log_t) create_files_pattern(smbd_t,samba_log_t,samba_log_t) +append_files_pattern(smbd_t,samba_log_t,samba_log_t) allow smbd_t samba_log_t:dir setattr; dontaudit smbd_t samba_log_t:dir remove_name;