As with the situation in an earlier post, the version of Subversion that is in the official Ubuntu repository is not the latest that is available elsewhere. The version that you currently get by installing Subversion on Ubuntu via apt-get is version 1.5, and 1.6 is out.

Fortunately, Anders Kaseorg has provided a deb package for Subversion 1.6 for Ubuntu 9.04 “Jaunty Jackelope” at https://launchpad.net/~anders-kaseorg/+archive/subversion-1.6

There are versions there for hardy and intrepid as well.

Happy versioning!