http://www.malcolmcoles.co.uk/blog/wordpress-smart-quotes/
I hope they add a turn off option in the control panel asap
To fix this, you can disable the automatic smart quote function. Go to your functions.php file, and enter the following code:
remove_filter(’the_content’, ’wptexturize’);
remove_filter(’comment_text’, ’wptexturize’);
remove_filter (’single_post_title’, ’wptexturize’);
remove_filter (’the_title’, ’wptexturize’);
remove_filter (’wp_title’, ’wptexturize’);
