I have just released YaWiki 0.20. The change notes are:
* Added "edit this page" link in the authentication box, so you don't need to scroll all the way down to end of the page
* Can now specify i18n strings for submit buttons (Save, Cancel, Delete, etc) and scripts will honor them. See the new Yawp.conf-dist.php file for more information. Per request from Heiner Gassen.
* History links to older page versions now bring up the proper version, not the current version. Per note from Lukas Smith.