Here are the release note for Version 2.5. As always all versions I am able to build myself, that is DOS, Aix, SunOS, Solaris and HPUX are made available at the same time.
Sources are also available for the other platforms.
This is a fairly major upgrade, especially for UNIX users, but is an early release, so you may choose not to update your copy yet. Because it adds new features, I am sending it to ALL registered users, even those who are marked Occasional. A WP6 document may give rise to incorrect style handling. Caption formatting carries over into document 4. Some WP6 documents have equations with null captions.