Hi all, After upgrading to RC4 all my test''s fail with errors similar to the following: ActiveRecord::StatementInvalid: Cannot delete or update a parent row: a foreign key constraint fails: DELETE FROM developers /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.13.0/lib/ active_record/connection_adapters/abstract_adapter.rb:67:in `log'' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.13.0/lib/ active_record/connection_adapters/mysql_adapter.rb:155:in `execute'' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.13.0/lib/ active_record/connection_adapters/mysql_adapter.rb:179:in `delete'' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.13.0/lib/ active_record/fixtures.rb:279:in `delete_existing_fixtures'' /usr/local/lib/ruby/gems/1.8/gems/activerecord-1.13.0/lib/ active_record/fixtures.rb:252:in `create_fixtures'' It''s obvious that the FK constrains is preventing Rails from cleaning up the DB tables after a test, but I don''t know what to do about it. Further confusing the issue is I set "use_transactional_fixtures" to true, so it doesn''t make sense to me why Rails would need to clean out the DB after each test (since I thought it would just roll back). Any help would be greatly appreciated. Thanks! --Dave.