Subversion 1.5 Release Notes

What's New in Subversion 1.5

    * Merge tracking (foundational)
    * Sparse checkouts (via new --depth option)
    * Interactive conflict resolution
    * Changelist support
    * Relative URLs, peg revisions in svn:externals
    * Cyrus SASL support for ra_svn and svnserve
    * Improved support for large deployments on FSFS, via sharding
    * Improved FSFS optimizability, via immutable file isolation
    * WebDAV transparent write-through proxy
    * Improvements to copy and move
    * Speed improvements, cancellation response improvements
    * Easier to try experimental ra_serf DAV access module
    * API changes, improvements, and much language bindings work
    * More than 150 new bug fixes, enhancements

Subversion 1.5 is a superset of all previous Subversion releases, and is considered the current "best" release. Any feature or bugfix in 1.0.x through 1.4.x is also in 1.5, but 1.5 contains features and bugfixes not present in any earlier release.

http://subversion.tigris.org/svn_1.5_releasenotes.html