problema com o sarg

Boas pessoal

Configurei um Squid com autenticação sobre Winbind contra um PDC Samba, e está tudo a funcionar correctamente. Quando configurei o Sarg e o coloquei para correr ele deu-m o seguinte output:

proxy:~# sarg -z
SARG: ConfigFile.........= /etc/sarg//sarg.conf
SARG: AccessLog..........= /var/log/squid/access.log
SARG: BgColor............= background_color white
SARG: TxColor............= #000000
SARG: TxBgColor..........= lavender
SARG: TiColor............= green
SARG: LogoImage..........=
SARG: LogoText...........= Cosval
SARG: LogoTextColor......= #000000
SARG: Width..............= 80
SARG: Height.............= 45
SARG: Title..............= Cosval - Proxy User Access Reports
SARG: BgImage............=
SARG: FontFace...........= Tahoma,Verdana,Arial
SARG: HeaderColor........= darkblue
SARG: HeaderBgColor......= blanchedalmond
SARG: FontSize...........= 9px
SARG: PasswdFile.........=
SARG: TempDir............= /tmp
SARG: OutputDir..........= /usr/local/sarg/html
SARG: Ip2Name............= no
SARG: TopuserSortField.........= BYTES
SARG: UserSortField.........= BYTES
SARG: TopuserSortOrder.........= reverse
SARG: UserSortOrder.........= reverse
SARG: UserAgentLog.......=
SARG: ExcludeHosts.......=
SARG: DateFormat.........= e
SARG: ExcludeUsers.......=
SARG: PerUserLimitFile...=
SARG: PerUserLimit.......=
SARG: UserIp.............= no
SARG: MaxElapsed.........= 28800000
SARG: LastLog............= 0
SARG:
SARG: Records in file: 60685, reading: 100.00%
SARG: No records found
SARG: End

Seguindo o output do ficheiro /var/log/squid/access.log vejo q está tudo bem ..

(...)
1108738378.210 434 192.168.0.25 TCP_MISS/200 712 GET http://media.fastclick.net/w/get.media? jreis DIRECT/205.180.86.2 application/x-javascript
1108738378.278 57 192.168.0.25 TCP_DENIED/407 1793 GET http://pics-70.hi5.com/userpics/0/11....img.thumb.jpg - NONE/- text/html
1108738378.345 442 192.168.0.25 TCP_MISS/304 161 GET http://pics-04.hi5.com/userpics/4/10....img.thumb.jpg jreis DIRECT/69.28.178.10 image/jpeg
1108738378.384 37 192.168.0.25 TCP_IMS_HIT/304 205 GET http://pics-39.hi5.com/userpics/539/....img.thumb.jpg jreis NONE/- image/jpeg
1108738378.681 402 192.168.0.25 TCP_MISS/304 161 GET http://pics-70.hi5.com/userpics/0/11....img.thumb.jpg jreis DIRECT/68.142.83.198 image/jpeg
1108738378.708 1095 192.168.0.25 TCP_MISS/304 160 GET http://pics-53.hi5.com/userpics/553/....img.thumb.jpg jreis DIRECT/69.28.159.16 image/jpeg
1108738378.817 901 192.168.0.25 TCP_MISS/304 160 GET http://pics-59.hi5.com/userpics/159/....img.thumb.jpg jreis DIRECT/69.28.159.16 image/jpeg
1108738378.908 523 192.168.0.25 TCP_MISS/200 925 GET http://c7.zedo.com/ads2/d/3861/0/224/27/e56.js? jreis DIRECT/195.23.135.150 application/x-javascript
1108738378.918 9 192.168.0.25 TCP_NEGATIVE_HIT/404 854 GET http://www.hi5.com/favicon.ico jreis NONE/- text/html
1108738378.964 281 192.168.0.25 TCP_REFRESH_HIT/304 292 GET http://cdn.fastclick.net/fastclick.n...media56353.gif jreis DIRECT/69.25.43.140 image/gif
1108738379.338 630 192.168.0.25 TCP_MISS/200 486 GET http://l7.zedo.com/log/p.gif? jreis DIRECT/69.28.159.7 image/gif
1108738379.572 755 192.168.0.25 TCP_MISS/200 961 GET http://context3.kanoodle.com/cgi-bin/kontext.cgi? jreis DIRECT/65.169.109.35 text/html
1108738379.621 48 192.168.0.25 TCP_NEGATIVE_HIT/404 854 GET http://www.hi5.com/favicon.ico jreis NONE/- text/html

(...)

A contagem de registos coincide com os lidos pelo SARG:
proxy:/etc/sarg# wc -l /var/log/squid/access.log
60685 /var/log/squid/access.log

Mas porquê "SARG: No records found" ?!

Obrigado