嗯，以前用着用着都是没问题的，前几天看着评论栏直接无法访问了（蛋疼的防火墙），于是干脆关掉了，可是关掉之后发现好怀念那东西的网站统计啊……好想要回来啊，于是又重新启用，结果出问题了。

得到了这样的东西

Your Jetpack has a glitch. Something went wrong that’s never supposed to happen. Guess you’re just lucky: xml_rpc-32601

Try connecting again. Error Details: The Jetpack server could not communicate with your site’s XML-RPC URL. If you have the W3 Total Cache plugin installed, deactivate W3 Total Cache, try to Connect to WordPress.com again, reactivate W3 Total Cache, then clear W3 Total Cache’s cache.

卧槽，用的好好地怎么就突然出问题了呢？

经过啦大量的搜索，找到了解决的办法，原来是跟lighttpd的rewrite有关。

根据http://en.forums.wordpress.com/topic/jetpack-instl-issue-with-ssl-and-lighttpd（要求跨越防火墙），找到了解决的办法。
有一位有类似情况的人，将rewrite规则从

#Jetpack is broken with these rules
url.rewrite-once=(
 "^/(wp-.+).*/?" => "$0",
 "^/images/.*/?" => "$0",
 "^/temp/.*/?" => "$0",
 "^/(sitemap.xml)" => "$0",
 "^/(xmlrpc.php)" => "$0",
 "^/keyword/([A-Za-z_0-9\-]+)/?$" => "/index.php?keyword=$1",
 "^/.*?(\?.*)?$" => "/index.php$1"

改成了

#Jetpack works with these rules
url.rewrite-if-not-file = (
 "^/(wp-.+).*/?" => "$0",
 "^/images/.*/?" => "$0",
 "^/temp/.*/?" => "$0",
 "^/keyword/([A-Za-z_0-9\-]+)/?$" => "/index.php?keyword=$1",
 "^/.*?(\?.*)?$" => "/index.php$1"
 )

之后，Jetpack好了。我改成这样也没问题了。