I noticed &_v= in js files url is not escaped as &, found that while running html validation tests
XenForo_Template_Abstract, Line #477
Should be
XenForo_Template_Abstract, Line #477
PHP:
$file = $file . (strpos($file, '?') ? '&' : '?') . '_v=' . XenForo_Application::$jsVersion;
PHP:
$file = $file . (strpos($file, '?') ? '&' : '?') . '_v=' . XenForo_Application::$jsVersion;