Call to undefined method wpdb::get_blog_prefix() in /wp-admin/includes/user.php on line 260

[NightAngel]

I don't use "wp_" prefix for my tables. Of course, the $table_prefix= value is correct in wp-config.php.

The error when I create (or modify) an article : Call to undefined method wpdb::get_blog_prefix() in /wp-admin/includes/user.php on line 260

PS : WP_DEBUG is true... obviously.

[filosofo]

Are you using a custom db class, usually in a file named db.php in wp-content?

[NightAngel]

Sorry, I deleted db.php in wp-content. But what is this file ? Created by plugin ? Never seen such a file here !

Thank you !

[mynetx]

Yes, this file is created by some caching plugins.

[hakre]

Fix is to update your caching plugin to a version that is compatible to 3.0.