[Samba] Strange winbindd messages

[John Center]

Hi,

We are running samba v3.6.3 on Ubuntu 12.04 server.  This is being used 
with FreeRADIUS for wireless authentication with AD.  We just logged a 
set of messages from winbindd that I don't understand:

Jan 23 10:35:28 as3 winbindd[25371]: [2013/01/23 10:35:28.056846,  0] 
rpc_client/cli_netlogon.c:677(rpccli_netlogon_set_trust_password)
Jan 23 10:35:28 as3 winbindd[25371]:   dcerpc_netr_ServerPasswordSet{2} 
failed: NT code 0xc00002a5
Jan 23 10:35:28 as3 winbindd[26636]: [2013/01/23 10:35:28.105143,  0] 
rpc_client/cli_netlogon.c:671(rpccli_netlogon_set_trust_password)
Jan 23 10:35:28 as3 winbindd[26636]:   credentials chain check failed
Jan 23 10:35:28 as3 winbindd[25518]: [2013/01/23 10:35:28.310288,  0] 
rpc_client/cli_netlogon.c:671(rpccli_netlogon_set_trust_password)
Jan 23 10:35:28 as3 winbindd[25518]:   credentials chain check failed
Jan 23 10:36:28 as3 winbindd[25371]: [2013/01/23 10:36:28.121861,  0] 
rpc_client/cli_netlogon.c:671(rpccli_netlogon_set_trust_password)
Jan 23 10:36:28 as3 winbindd[25371]:   credentials chain check failed

Authentications went through ok at 10:35:23 & again at 10:35:29.  We 
haven't seen them before, & searching, I couldn't find much info.  What 
do these messages mean?  What would have caused them?  Do we need to be 
concerned?  Any help would be greatly appreciated.

Thanks.

	-John

-- 
John Center
Villanova University