Gravatar头像被墙之后，头像显示不出来解决方案。修改为多说的缓存，也算是一个备胎。而且多说的速度相对于其他的来说速度更快。

1.修改/include/lib/function.base.php.

找到：

/**
 * 获取Gravatar头像
 * http://en.gravatar.com/site/implement/images/
 * @param $email
 * @param $s size
 * @param $d default avatar
 * @param $g
 */
function getGravatar($email, $s = 40, $d = 'mm', $g = 'g') {
$hash = md5($email);
$avatar = "http://www.gravatar.com/avatar/$hash?s=$s&d=$d&r=$g";
return $avatar;
}

改为 

/**
 * 获取Gravatar头像
 * http://en.gravatar.com/site/implement/images/
 * @param $email
 * @param $s size
 * @param $d default avatar
 * @param $g
 */
function getGravatar($email, $s = 40, $d = 'mm', $g = 'g') {
$hash = md5($email);
$avatar = "http://cn.gravatar.com/avatar/$hash?s=$s&d=$d&r=$g";
return $avatar;
}

OK,刷新一下或者更新缓存即可。。