I’m having similar problems this morning as well. MY error message reads “Error establishing a database connection
This either means that the username and password information in your wp-config.php file is incorrect or we can’t contact the database server at localhost. This could mean your host’s database server is down.”
Having the same problem as the thread starter on a couple of my installs. Both 2.2.1 and not other changes recently, get 404 tryting to access wp-admin (can get the login screen, that’s it). Other installs on the same server have no problems. Nothing changed recently. Worrysome.
Thanks for the reply justin, it’s not a problem with the version. I’ve been running 2.2.1 for quite some time with no issues. Just randomly happened this morning. I’ve restarted apache, mysql, even rebooted the entire server. Cleared cookies and cache in my browser, everything. Just happens on a couple installs, thinking maybe something has been compromised.