WordPress MU 2.8.5.1 has just been released and is available for download immediately. This release addresses several security issues and bug-fixes. WordPress MU version 2.8.5 was tagged and ready for release when a bug was discovered which prevented editing of blogs. That is why this release is tagged 2.8.5.1. It is recommended to upgrade to version 2.8.5.1 immediately.
This release also fixes a problem with slashes in blog and site options. You’ll be prompted to run the site upgrader. Please run it on all your blogs.
If you are using the automatic upgrading feature in WordPress MU 2.8.2, you’ll first need to edit line 697 in wp-admin/includes/class-wp-upgrader.php. Replace “wordpress” with “wordpress-mu”.
Before:
if ( !$wp_filesystem->copy($working_dir . '/wordpress/wp-admin/includes/update-core.php', $wp_dir . 'wp-admin/includes/update-core.php', true) )
After:
if ( !$wp_filesystem->copy($working_dir . '/wordpress-mu/wp-admin/includes/update-core.php', $wp_dir . 'wp-admin/includes/update-core.php', true) )
You can use the auto upgrader after saving the changes. This bug was fixed in WordPress MU 2.8.3, so you only need to do this if you are using the auto upgrader from version 2.8.2.
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