http://www.petri.co.il/download_free_reskit_tools.htm

Petri is a wealth of knowledge.  Today we're tracking down Userenv Event ID 1097, "Windows cannot find the machine account. The clocks on the client and server machines are skewed."  Also maybe related, Kerberos Event ID 5, "The kerberos client received a KRB_AP_ERR_TKT_NYV error from the server...."

Ages ago I'd seen issues in the past when the machine account fell out of sync with the domain, and this sounded similar.  Googling "command line recreate server machine account" set me in the right direction, the NLTEST looked promising, but ultimately finding the NETDOM utility with the RESET command.  Did it work?  A reboot later and the messages were gone.

I did actually download the XP version of NETDOM from the below link, but Mental Note to grab all the old versions of these Resource Kit tools.
  http://www.microsoft.com/downloads/en/details.aspx?FamilyId=49AE8576-9BB9-4126-9761-BA8011FABF38