Eventhough I am focusing my attention to Joomla 1.5 RC2, but at the meantime, I am still continually monitoring some of my Joomla websites running 1.0.12. and time has come to upgrade them to Joomla 1.0.13.
All I need at this point is to use the patch to bring my Joomla 1.0.12 to the latest version of Joomla 1.0.13 as of September 2007.
Here is the download site. http://joomlacode.org/gf/project/joomla/frs/
Guide for an update
Best resource for a planned update is to read the “How to patch Joomla 1.0.x to Joomla 1.0.x at the Joomla Forums http://forum.joomla.org/index.php/topic,33226.0.html
Screenshot of the files inside the zip file