ntpd/ntpdate throwing errors

Hi,

I know I shouldn't be doing this, but I've been looking at the Console lately and I've noticed that ntp and ntpdate are throwing some errors into the log regularly.

I've added a number of ntp servers to ntp.conf, but the system keeps complaining it can't find any of them.

My Mac connects to the internet wirelessly via a Linksys router. There is also a Windows computer connected through the same router (wired). The Windows computer has absolutely no problems connecting and synchronising with any of the ntp servers configured on my Mac. The wireless internet connection is perfect. No complaints there.

What I've tried sofar.
In System Preferences switched off automatic syncing. Then in the Terminal start 'ntpdate -v'. It had no problems whatsoever to sync with time.nist.gov.
In System Preferences switched on auto syncing. The messages in the log returned.

What puzzles me when looking at the log, is that despite the fact that both ntp and ntpdate complain that they can't connect to a server, once in a while the clock is adjusted and sofar the system seems to remain in sync...

Anyone can explain what's going on?

Here's part of the log (filtered on "ntp"):

Error 26-08-08 15:38:30 ntpdate[66] no servers can be used, exiting
Notice 26-08-08 15:42:54 ntpd[26] time reset +0.633558 s
Notice 26-08-08 16:29:53 ntpd[26] time reset +1.146082 s
Notice 26-08-08 19:10:59 ntpd[26] time reset +0.906559 s
Warning 27-08-08 07:12:53 com.apple.launchd[1] (org.ntp.ntpd) Unknown key: SHAuthorizationRight
Notice 27-08-08 07:12:59 org.ntp.ntpd[26] Error : nodename nor servname provided, or not known
Notice 27-08-08 07:12:59 org.ntp.ntpd[26] Error : nodename nor servname provided, or not known
Notice 27-08-08 07:12:59 org.ntp.ntpd[26] Error : nodename nor servname provided, or not known
Notice 27-08-08 07:12:59 org.ntp.ntpd[26] Error : nodename nor servname provided, or not known
Notice 27-08-08 07:12:59 org.ntp.ntpd[26] Error : nodename nor servname provided, or not known
Notice 27-08-08 07:12:59 org.ntp.ntpd[26] Error : nodename nor servname provided, or not known
Error 27-08-08 07:12:59 ntpdate[58] can't find host time.nist.gov
Notice 27-08-08 07:13:00 org.ntp.ntpd[26] Error : nodename nor servname provided, or not known
Notice 27-08-08 07:13:00 org.ntp.ntpd[26] Error : nodename nor servname provided, or not known
Notice 27-08-08 07:13:00 org.ntp.ntpd[26] Error : nodename nor servname provided, or not known
Error 27-08-08 07:12:59 ntpdate[58] can't find host time.apple.com
Error 27-08-08 07:12:59 ntpdate[58] can't find host ntp0.nl.net
Error 27-08-08 07:12:59 ntpdate[58] can't find host ntp1.nl.net
Error 27-08-08 07:12:59 ntpdate[58] can't find host ntp2.nl.net
Error 27-08-08 07:12:59 ntpdate[58] can't find host 0.pool.ntp.org
Error 27-08-08 07:13:00 ntpdate[58] can't find host 1.pool.ntp.org
Error 27-08-08 07:13:00 ntpdate[58] can't find host 2.pool.ntp.org
Error 27-08-08 07:13:00 ntpdate[58] can't find host pool.ntp.org
Error 27-08-08 07:13:00 ntpdate[58] no servers can be used, exiting
Notice 27-08-08 07:16:38 ntpd[26] time reset +0.324068 s