Thanks for the reply - the reason that I ask, is that I am trying to migrate from acegi security to spring-security in a spring 2.5 based application.

I am getting this exception:

Caused by: java.lang.NoSuchMethodError: org.springframework.aop.config.AopNamespaceUtils.r egisterAutoProxyCreatorIfNecessary(Lorg/springframework/beans/factory/xml/ParserContext;Ljava/lang/ObjectV
at org.springframework.security.config.AnnotationDriv enBeanDefinitionParser.parse(AnnotationDrivenBeanD efinitionParser.java:70)
at org.springframework.beans.factory.xml.NamespaceHan dlerSupport.parse(NamespaceHandlerSupport.java:69)
at org.springframework.beans.factory.xml.BeanDefiniti onParserDelegate.parseCustomElement(BeanDefinition ParserDelegate.java:1246)
at org.springframework.beans.factory.xml.BeanDefiniti onParserDelegate.parseCustomElement(BeanDefinition ParserDelegate.java:1236)
at org.springframework.beans.factory.xml.DefaultBeanD efinitionDocumentReader.parseBeanDefinitions(Defau ltBeanDefinitionDocumentReader.java:133)
at org.springframework.beans.factory.xml.DefaultBeanD efinitionDocumentReader.registerBeanDefinitions(De faultBeanDefinitionDocumentReader.java:90)
at org.springframework.beans.factory.xml.XmlBeanDefin itionReader.registerBeanDefinitions(XmlBeanDefinit ionReader.java:468)
at org.springframework.beans.factory.xml.XmlBeanDefin itionReader.doLoadBeanDefinitions(XmlBeanDefinitio nReader.java:363)

I'd be happy to submit a JIRA bug report - I just wasn't sure that this was meant to work.