Posted by Nessa | Posted in wordpress | Posted on May 16, 2010
This was a particularly annoying error message that was occurring for one of my legacy plugins that I refuse to get rid of. There are a lot of sites that indicate the problem is with a failed upgrade or misnamed database tables,but for me it was simply an issue with an old plugin and wasn’t happening anywhere else.
My fix was to edit the plugin file and change instances of admin_head to admin_menu . It’s apparently just a compatibility issue with newer WP versions.