And post number 3 on updating Drupal.
Again about updating the core. I already talked about doing it on an Acquia Drupal Install.
Now: Just a normal update.
After my post about updating the Drupal core on an Acquia Install – now how to update pre-installed modules.
SECURITY: I don’t know if this will work for you (it should!) so go on and back up your database and your code basically your site (database backup and copy of all files in your Drupal install). If something goes wrong and you don’t have a backup – it’s on your head. Try at own risk.
Download and extract the new release of Drupal. Open your folder and delete all files and folders of your old install without the sites/ folder. Now insert the new files and folders again without the sites/folder. And your done.
Don’t forget to run the update.php script!