How to update from Joomla 3.0.0 to Joomla 3.0.1
(note: Joomla 3.0.1 will be released at approximately 9am PDT on October 9th, 2012)
This tutorial will show you how to update from Joomla 3.0.0 to 3.0.1, which is a bit different than normal.
If you use Joomla!'s FTP layer please see Note 3 below.
The update process is generally safe, but it's always a good idea to make a backup before updating. So please go ahead and make a backup of your site now.
After getting the success message, go to Components >> Joomla! Update.
Note #1: If you are not getting the "Note: Hot patch for 3.0.1 update is installed" message, then please repeat Step 2 or ask for some help from a trusted developer.
Note #2: If you're not getting the "Joomla! update was found", click on Purge Cache button.
If you see both of the above, Install the Update.
Note #3: If you use FTP, you might have to FTP the update package, which you can download at: http://joomlacode.org/gf/project/joomla/frs/?action=FrsReleaseBrowse&frs_package_id=6517