I have some WP installations that are currently running on WordPress 4.0.1 and I have the auto-upgrade option set on these installations, but they somehow have not updated automatically to the new version 4.1. I have to do it manually. What could be the problem? Or is the 4.1 update a major update, so it will not update automatically (it would e.g. from 4.1 to 4.1.1)?
You are right about 4.1 not being a minor update that updates automatically. I had to push the "update" button my Wordpress installs as well. Minor updates such as security fixes will update automatically. The second dot number indicates a minor version. 4.1.x -- x is the minor version. It looks like there may be a way to configure Wordpress to do major updates automatically. I have not tried it. Major updates often involve database changes and when that is to occur, it is always a good idea to backup your data first. https://make.wordpress.org/core/201...e-to-disabling-auto-updates-in-wordpress-3-7/ http://codex.wordpress.org/Configuring_Automatic_Background_Updates
By default WP pushes only minor updates. You can enable all updates automatically by adding the following to the wp-config.php define( 'WP_AUTO_UPDATE_CORE', true ); Code (markup): Enable only minor updates define( 'WP_AUTO_UPDATE_CORE', 'minor' ); Code (markup): Though it is advisable not to enable all updates automatically as it might break some plugins, which was the reason it is not enabled by default.