did you make any changes to the theme code in 3.6.7?
If you look at the page source, you will see this at the end
<b>Fatal error</b>:Call to undefined function bfa_incl() in <b>/home/content/96/7117796/html/news/wp-content/themes/atahualpa/css.php</b> on line <b>235</b><br />
Now the function bfa_incl() is defined in functions.php on line 963 so you might want to look at your functions.php and see if you have the correct version.
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Juggledad | Forum Moderator/Support