ResourceHttpRequestHandler sends content without content-type header if no media type found (SPR-7713)

Portlet session mutex uses global session attribute to be shared among all portlets in the session (SPR-8888)

ConversionService prevents Converter from trying to convert to a subtype of its actual target type (SPR-8718)

CollectionCollection/MapToMapConverter preserve original Collection/Map if no converted elements (SPR-8714)

fixed ServletServerHttpRequest to reconstruct from "request.getParameterMap()" for form POST only (SPR-8688)

AbstractCachingViewResolver allows for caching unresolved view names ("cacheUnresolved"=true; SPR-8524)

JPA EntityManagerFactoryUtils silently ignores IllegalArgumentExceptions from setHint calls (SPR-7947)

JDO PersistenceManager synchronization performs close attempt after completion (if necessary; SPR-8846)

TransactionSynchronizationManager eagerly cleans up void ResourceHolders on any access (SPR-8844, SPR-8845)

added "forwarder" property to ConnectorServerFactoryBean, accepting an MBeanServerForwarder (SPR-8820)

Servlet/PortletContextResource's getFile prefers "file:" URL resolution over calling getRealPath (SPR-8461)

fixed "formMultiSelect"/"formCheckboxes" FreeMarker macros to compare against actual field value (SPR-7721)