I had just installed Drupal v6.2 into my domain hosted by godaddy.com. The first thing to see when I logged in (through the Drupal home page at my domain's URL) was the security alert advising me to upgrade to Drupal v6.3.
I studied the documentation, backed up and restored my database, and attempted to run upgrade.php; I now have a Drupal home page with the following message displayed:
Site off-line
The site is currently not available due to technical problems.
Please try again later. Thank you for your understanding.
If you are the maintainer of this site, please check your database
settings in the settings.php file and ensure that your hosting
provider's database server is running. For more help, see the
handbook, or contact your hosting provider.
The mysqli error was: Access denied for user
'xxxxxxxxxxxxxxxx'@'6x.xxx.2xx.85' (using password: YES).
I didn't attempt to use "YES" as my password. Following the troubleshooting FAQs and some forum posts, I have attempted to edit settings.php, but my changes cannot be saved for some reason; however, changes to
default/settings.php can be saved.(?)