This project includes 2 tasks:
1. Upgrade Joomla 1.5.22 to latest stable 2.5.x version
You do not need to worry about the compatibility of the template as we will choose a new template anyway.
2. Fix bug in user manager listing on Joomla backend
After moving the site to a different server we can only see the single "super administrator" listed under the user manager on the backend. And if we add a new user the process looks completely normal, but the new user is not listed in the user manager overview (but the user is created in the DB).
These are the two first tasks in a possible series of tasks in updating the Joomla site.