I haven't tweaked my WP core files. I didn't edit any of those found in my "wp-admin" folder, but I got this error when I posted an Aside. Warning: Cannot modify header information - headers already sent by (output started at /home/*/wp-includes/wp-db.php:104) in /home/*/wp-includes/pluggable-functions.php on line 270 And it seems to be working now after reloading the browser. Hmmm...