This is what chrome's console says:
Resource interpreted as Stylesheet but transferred with MIME type text/html: "someserver/wp-content/themes/pgcss/normalize.css/?ver=3.5.1". someserver:18
Resource interpreted as Image but transferred with MIME type text/html: "someserver/wp-content/themes/pgimg/lens.png/". someserver:77
Obviously something in injecting a slash at the end of my file.
I am not very familiar with nginx , what can I do?