Problems with MySQL Replication and Migrations

Does anyone have MySQL replication set up for a Rails App that uses
migrations? I'm having an issue where every time I run a migration
Rails is trying to create the schema_info table.

Mysql::Error: Table 'schema_info' already exists: CREATE TABLE
schema_info (version int(11))

This causes a problem on the slave databases where the replicated
create table statement causes an error that stops the slave's SQL
thread.

I'm wondering if there is a reason why the migrations framework keeps
trying to create the table, rather than checking for its existence
first.

Thanks in advance.

Erik