Raised source and target compatibility to JDK 1.6
JDK 1.6+ API baseline across the codebase
StaxUtils relies on JAXP 1.4 (as included in JDK 1.6+)
CustomizableTraceInterceptor relies on JDK 1.5+ Matcher.quoteReplacement method now
JtaTransactionManager relies on presence of JTA 1.1 API
Removed JMS 1.0.2 support
Removed Servlet 2.4 forward attribute support in InternalResourceView and TilesView
Removed OC4J support (including documentation references)
Removed JAX-RPC support
Removed scheduling.timer and scheduling.backportconcurrent packages
Removed iBATIS SQL Maps support
Removed EJB 2.x implementation class hierarchy (ejb.support package)
Removed JUnit 3.8 based test class hierarchy
Removed Spring MVC command/form controller class hierarchy
Removed Spring’s own JSP expression support (in favor of JSP 2.0+)
Added missing section end tag
Require JRuby 1.6+ (avoiding the use of deprecated API)
General JPA 2.0+ requirement; upgraded build and tests to EclipseLink 2.4, OpenJPA 2.2, Hibernate 3.6
Removed spring-struts module (Struts 1.x support)
Removed unintended backport-concurrency dependency