Track-that-stat breaks si-captcha.
You can not log in. Login page says you must accept cookies, but cookies are accepted everywhere.
So I have had to rename si-captcha plugin folder in order to log in. Then, I've deactivated the stats plugin. I can login as usual with si-captcha active (after back-rename and activate).
I'm using ssl for login and admin pages. I have accept the auto-generated ssl certificate.
I think is a bug with track-that-stat.