I need an advice on how to troubleshoot the problem.
Tried to find anything on forum, but most of them related to plugins issue.
- WP v3.3.2
- Plugins related to listing has been disabled
- No custom functions/hooks/filters was created related to the listing
Posts/Pages/Custom post types post was corrupted - http://cl.ly/GXOZ
WP_DEBUG is enabled, showing - http://cl.ly/GXrR
Value from $this->get_column_info(); - http://cl.ly/GXdK - $column value is NULL
wp-admin/includes/screens.php -> function get_column_headers( $screen )
- did not return any values.
$screen & $screen->id - do have valid value (eg: edit-post)
What next? what could possibly contribute to the problem?
--DIRTY FIX was applied just for a while--