Ticket #25819: 25819.patch

wp-admin/includes/upgrade.php

@@ -1303 +1303 @@
         }
 
         // 3.5
-        if ( $wp_current_db_version < 21823 )
+        if ( $wp_current_db_version < 21823 ) {
+                remove_all_filters( 'default_site_option_ms_files_rewriting' );
                 update_site_option( 'ms_files_rewriting', '1' );
+        }
 
         // 3.5.2
         if ( $wp_current_db_version < 24448 ) {