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2
I get this error when there are no menus defined or no menus set for the location at Appearance->Menus. When that occurs wp_nav_menu uses a page walker fallback.
The fallback (default) for wp_nav_menu is wp_walker_page
which uses wp_page_menu
which uses wp_list_pages
which uses walk_page_tree
which uses Walker_Page not Walker_Nav_Menu.
And apparently ...
1
I figured it out. Turns out that using the field name was the culprit. It appears that name and other field names like attachment, attachment_id, etc will cause WordPress to produce a 404 error. There's a whole list of reserved terms in the Codex.
1
You were right Toscho, it is a plugin called 'better WP-Security'
I did a search for '418' as suggested in the files I had backed up via ftp and found this:
$bwpsmemlimit = (int) ini_get( 'memory_limit' )
//if they're locked out or banned die
if ( ( $bwpsoptions['id_enabled'] == 1 ||$bwpsoptions['ll_enabled'] == 1 ) && $this->checklock( ...
1
It is likely a callback function for something. My guess is that somewhere something is trying to use a function named mytheme_admin_bar_render as a callback but that function has not been defined. Something like...
add_filter('something','mytheme_admin_bar_render');
... possibly but there are many, many possibilities.
grep your wp-content folder for ...
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