I was working on a client's shopping cart (WP e-commerce plugin, custom theme). I edited a post (product page), and clicked the "update" button; received this error message:
Warning: Cannot modify header information - headers already sent by (output started at /home/coffee/public_html/TestDEV/wp-content/themes/roasthouse/functions.php:1) in /home/coffee/public_html/TestDEV/wp-includes/pluggable.php on line 934
Can anyone shed some light as to the cause?
P.S. Host uses cPanel.