Ticket #18768: ticket.18768.diff

wp-admin/includes/file.php

@@ -81 +81 @@
         $siteurl = get_option( 'siteurl' );
         if ( $home != '' && $home != $siteurl ) {
                 $wp_path_rel_to_home = str_replace($home, '', $siteurl); /* $siteurl - $home */
-                $pos = strpos($_SERVER["SCRIPT_FILENAME"], $wp_path_rel_to_home);
+                $pos = strrpos($_SERVER["SCRIPT_FILENAME"], $wp_path_rel_to_home);
                 $home_path = substr($_SERVER["SCRIPT_FILENAME"], 0, $pos);
                 $home_path = trailingslashit( $home_path );
         } else {