Start using your one-click update fingers: Joomla 2.5.3 has been released.
This release fixed two security problems. So, unless you have Joomla 1.5, there's now only one correct answer to the question "what version of Joomla are you running?" The answer is Joomla 2.5.3.
You should upgrade to Joomla 2.5.3 from any previous version of Joomla 1.6, 1.7 or 2.5.
We've got full instructions on how to upgrade here.
If you are on Joomla 1.5, don't worry because your version doesn't require an update. There's no rush, but if you do eventually want to upgrade to Joomla 2.5, here are two useful tutorials:
With Admincredible you can update and manage all your Joomla sites. If you have 5 or 500 sites, Admincredible will make your life easier! Visit Admincredible.com.
All of our tutorials are published under the Creative Commons Attribution-NonCommercial license. This means: