I’ve just spent a while hunting this down, it’s related to Firefox’s prefetching combined with wordpress’s use of the rel=”next” meta tag.
To remove these meta tags from your WordPress site, add the following to your theme’s functions.php file:
For WordPress versions 3.0 and above:
//remove auto loading rel=next post link in header
remove_action(‘wp_head’, ‘adjacent_posts_rel_link_wp_head’);
For older WordPress versions:
//remove auto loading rel=next post link in header
remove_action(‘wp_head’, ‘adjacent_posts_rel_link’);
See http://www.ebrueggeman.com/blog/wordpress-relnext-and-firefox-prefetching/
