// Redirect loops, no title in URL, $wgUsePathInfo URLs
} else if( $action == 'view' && !$request->wasPosted() &&
( ( !isset($this->GET['title']) || $title->getPrefixedDBKey() != $this->GET['title'] ) ||
+ // No valid variant in URL (if the main-language has multi-variants), to ensure
+ // the Accept-Language would only be added to XVO when a 301 redirection happened
( !isset($this->GET['variant']) && $perferred != $wgContLang->getCode() &&
$wgContLang->hasVariants() && !$wgUser->isLoggedIn() ) ) &&
!count( array_diff( array_keys( $this->GET ), array( 'action', 'title' ) ) ) )