<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<div class="yashare-auto-init" data-yashareL10n="ru" data-yashareType="button" data-yashareQuickServices="yaru,vkontakte,facebook,twit ter,odnoklassniki,moimir"></div>
</body>
</html>
Страница прошла валидацию
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<div class="yashare-auto-init" data-yashare-l10n="ru" data-yashare-type="button" data-yashare-quick-services="yaru,vkontakte,facebook,twit ter,odnoklassniki,moimir"></div>
</body>
</html>
Страница прошла валидацию
Какой у тебя DOCTYPE указан?