According to the release notes: http://apache.mirrors.tds.net/jackrabbit/RELEASE-NOTES.txt there are a number of bug fixes including fixes for memory leaks, concurrency issues, problems with versioning, etc. And as Sohil indicated, it should be a drop-in replacement. According to the release notes: anonymous wrote : 1.1 is fully compatible with the 1.0 release. An | Apache Jackrabbit 1.0 installation can be upgraded by replacing | the relevant jar files with the new versions. No changes to repository | contents are needed. Regards, Scott Dawson Unisys View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3990178#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...