Can't use property override configuration on FactoryBean instances

If you attempt to use property override configuration on a bean that implements BeanFactory and is not a TransactionProxyFactoryBean the application fails to start with the error "Unable to determine target bean definition for FactoryBeans of type x"

It looks like MapBasedSmartPropertyOverrideConfigurer assumes you must want to override properties of the target bean rather than the factory bean itself. However, it's reasonable to want to do so, e.g. setting configLocation on EhCacheManagerFactoryBean.