The org.jboss.bom.wfk:jboss-javaee-6.0-with-spring BOM should be updated to use following versions related to Spring Framework:

<version.spring>4.0.0.RELEASE</version.spring>
<version.spring.security>3.2.0.RELEASE</version.spring.security>
<version.spring.webflow>2.3.3.RELEASE</version.spring.webflow>
<version.spring.ws>2.1.4.RELEASE</version.spring.ws>
<version.aspectj>1.7.4</version.aspectj>

Spring Web Flow is not yet released, but this should happen in January 24th. In this release the support for Spring 4 is added.