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I have a MultiSite installation, which I tried to automatically upgrade from 3.0.x (don't remember exactly the version) to 3.4. While doing so, I think there was a problem with my FTP account and the automatic upgrade failed. Then I tried a manual upgrade as explained here: http://codex.wordpress.org/Updating_WordPress#Manual_Update

Now my blogs work, but when I go to /wp-admin, I get this error: Fatal error: Class 'WP_List_Table' not found in wp-admin/includes/list-table.php on line 76.

Does anyone have any idea?

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Does the file wp-admin/includes/class-wp-list-table.php exist on your installation? Is it complete? – toscho♦ Jun 15 '12 at 10:25
The file is there and it's complete. I'm guessing the require is not done where it should be, but I don't know how to investigate that.Any other suggestions? – bogdanvursu Jun 15 '12 at 11:24
Upload everything again, maybe some files were not transferred. – toscho♦ Jun 15 '12 at 11:27
this is closed to new answers, but you must manually include the class in the functions.php file of your theme or plugin: if(!class_exists('WP_List_Table')){ require_once( ABSPATH . 'wp-admin/includes/class-wp-list-table.php' ); } – GSto Nov 29 '12 at 19:11

closed as too localized by toscho♦ Jul 14 '12 at 21:27

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