[389-users] Long distance replication

Have any of you encountered issues with replication over long distances, such as between data centers? We have a master in each of our data centers and a consumer at each data center, but all changes are pretty much made at data center A and then replicated to its local consumer, then across our mpls to the master at data center B. For the second time in two months now our two LDAPs at data center B have gotten corrupted and I have had to reinitialize them from the master in data center A. Are there any replication tricks for long distance replication that could keep this from happening? thanks - EJ