Ticket #9824: 9824.3.patch

wp-includes/rewrite.php

@@ -1907 +1907 @@
 
                 $this->use_trailing_slashes = ( '/' == substr($this->permalink_structure, -1, 1) );
 
-                $this->use_verbose_page_rules = (bool) preg_match( "#^/%(postname|category|tag|author)%#", $this->permalink_structure );
+                $clean_structure = str_replace( '/index.php', '', $this->permalink_structure );
+                if ( is_multisite() && !is_subdomain_install() && is_main_site() )
+                        $clean_structure = str_replace( '/blog', '', $clean_structure );
+                $this->use_verbose_page_rules = (bool) preg_match( "#^/%(postname|category|tag|author)%#", $clean_structure );
         }
 
         /**