This morning as most mornings I did a manual check on the health of my newly upgraded domain (2003->2008). All the logs looked fine on the DCs so I thought all was ok, on a whim I did a repadmin /replsummary on both DCs. This has thrown an error on one of them:
Experienced the following operational errors trying to retrieve replication info
It successfully reports one set of replication. The other server reports both ways correctly.
I have not seen any other symptoms and no errors in the logs indicating any problems. Any thoughts?