When we have Peer to Peer (P2P) replication in place on SQL Server 2008, probably we would see a conflict

1) conflict of type 'Update-Update' was detected at peer 2 between peer 1 (incoming)

2) conflict of type 'Update-Delete’ was detected at peer 2 between peer 1 (incoming)

Microsoft has confirmed that this is known issue with P2P replication, and Microsoft has released a fix for this with Cumulative hot fix for SQL Server 2008 SP1. I am penning down some links for you as a point of reference for troubleshooting P2P conflict.

Paul Libson has wrote an excellent article on how to handle P2P replication

http://support.microsoft.com/kb/973223

http://technet.microsoft.com/en-us/library/bb934199.aspx

http://technet.microsoft.com/en-us/library/ms147366.aspx

http://technet.microsoft.com/en-us/library/ms151865.aspx

-- Hemantgiri S. Goswami (http://www.sql-server-citation.com )