Q from Efrat: Is there a flag I can use to tell the replication server to ignore duplicate entries? Currently it stops replicating each time it get duplicate entry
You can configure replication in order to ignore errors (all or some specific errors, such as a duplicate). In any case, the reason is that when you have a duplicate, this means there is some conflict, and the slave doesn't know which is right. There is coming conflict detection and resolution in some future version.

Q from Efrat: From where can I download a free trial version of MySql Enterprise server?
You can ontact mysql sales for a 30-day mysql enterprise trial, which includes MySQL Network Monitoring and Advisory Service

Q from Danilo: What is index merge?
It's when the optimizer merges several rows using one same index. See section 7.2.6 in the MySQL 5.0 …