Yes, viewing the Dependency Hierarchy of my pom.xml in STS verifies that config-3.1.3.RELEASE is on my classpath (Screen Shot 2012-12-02 at 1.57.30 PM.jpg).

The following code results in two deprecation messages:
(1) Referenced bean 'org.springframework.security.securityContextSourc e' not found
(2) Multiple annotations found at this line:
- Referenced bean 'org.springframework.security.securityContextSourc e' not found
- Method 'setRolePrefix' is marked deprecated

Code:
(1)    <authentication-manager xmlns="http://www.springframework.org/schema/security">
		<ldap-authentication-provider user-search-base="cn=users" 
							 user-search-filter="uid={0}" 
							 group-search-base="cn=groups" 
							 group-search-filter="member={0}"
(2)							 role-prefix="none"/>
	</authentication-manager>