This is a Work-In-Progress (WIP) release of the unstable 5.1 branch. The 5.1 branch is source compatible, but not binary compatible, with the stable 5.0 branch. It contains provisional new features which are subject to change at any time.

You can download it from SourceForge. The reference manual is available [online][a5docs], as is the list of [changes][changes-unstable].

We encourage users to test 5.1 releases and report bugs, but remember that they do not provide the stability of 5.0 releases.