I just put Track That Stat on a new blog that has virtually no traffic yet (except for bots and me). About once a day (seems like it happens the first time I go to the site) I get an SQL error. I don't see any more errors after that if I refresh or look at other pages. Curiously, I have not seen this problem on another site which has much more traffic.
The SQL error is a missing comma after page_id="-1":
WordPress database error: [You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'browser="Firefox 18",platform="WinXP" where ip_address="220.127.116.11" and page' at line 1]
UPDATE wp_tts_visitors SET time_last_visited="1360223580",num_visits=num_visits+1,page_id="-1"browser="Firefox 18",platform="WinXP" where ip_address="18.104.22.168" and page_url='http://spectrumz.com'