The account “sadmin” has been deleted out from under us!

We have a new Intel Xserve we recently set up with 10.6 Server. Initially we ran OD, DNS, and DHCP only on the machine while our file shares continued to run on our older 10.4 Servers. When I moved our Xserve RAID off of the old server and onto the Xserve we started experiencing issues where after approximately 24 hours we would have authentication issues connecting via SMB or AFP. Also, when I tried to connect via ARD or SSH I was unable to authenticate. Sometimes I could SSH in as root but others I would have to go to the console directly. A reboot clears the issue but about 24 hours later it comes back. Looking at the console I see: 3/5/10 8:08:58 AM com.apple.launchd.peruser.501187 (com.apple.PreferenceSyncAgent58171) The account "sadmin" has been deleted out from under us! 3/5/10 8:08:58 AM com.apple.launchd.peruser.501187 (com.apple.PreferenceSyncAgent58171) In a future build of the OS, this error will be fatal. 3/5/10 8:09:23 AM com.apple.launchd.peruser.501187 (com.apple.SubmitDiagInfo58190) The account "sadmin" has been deleted out from under us! 3/5/10 8:09:23 AM com.apple.launchd.peruser.501187 (com.apple.SubmitDiagInfo58190) In a future build of the OS, this error will be fatal. 3/5/10 8:09:29 AM com.apple.launchd.peruser.501187 (0x0-0x61061.com.apple.iCal.helper58201) The account "sadmin" has been deleted out from under us! 3/5/10 8:09:29 AM com.apple.launchd.peruser.501187 (0x0-0x61061.com.apple.iCal.helper58201) In a future build of the OS, this error will be fatal. (note: iCal service is not running) Any ideas on this? Daily reboots are annoying.