[Plugin: WordPress.com Stats] Checking Daily Stats returns 404 error

Is there an issue with the plugin, when click the chart to view the daily stats I’m getting a weird 404 error all of a sudden. The daily click leads to http://mydomain.com/my-stats/?blog=XXXXX&day=2012-01-21

obviously a my-stats directory doesn’t exist. Just noticed it started doing this this morning.

http://ww.wp.xz.cn/extend/plugins/stats/