Piwik 2.2.1 发布，此版本是个小版本，同时也是个更稳定的版本，建议更新。
改进记录：
All your settings will be saved and restored the next time you visit any report in Piwik.
Several bugs were fixed in the Installation process which affected a subset of users.
a Referrer spam blacklist feature was implemented
Developers: Period::factory() is deprecated, please use Period\Factory::build() instead
(released in 2.2.0) Event Tracking: track your custom events with Piwik.
更多更新内容请看发行说明。
项目主页：http://piwik.org/changelog/piwik-2-2-1/
来自:开源中国社区
