This release is mainly a bug release. There are improvements and fixes to the Resource API, datatype support and persistence. Another persistence library has been added, db4o, which has some different characteristics compared to the BDB implementation. However, it's generally a little slower that BDB. The persistence offered is currently only useful for processing large RDF files in environments with low memory requirements.
Also, the bug fixes made to One JAR have been integrated, so JRDF no longer has its own version.