[Plugin: mySTAT] myStat breaks Thematic child theme

I’m using a child theme with my theme Thematic, and the front page of the site looks as it should. When I blick on a post and enter the page with the post itself, there’s a lot of information showing at the top of the page that I guess myStat should take care of, but doesn’t do. See screenshot (http://shin-ken.se/mystatscreen.png).

When I switch to a default theme the problem goes away, and then I switch back the problem too is back. How do I solve this?

And I’m actually using v2.9.2 of WP and v2.6 of myStat.

http://wordpress.org/extend/plugins/mystat/