After installing WP-Cache (and following all the instructions so it should be working fine?!) I get the following error when I ever I try and do anything (post, add a category, change options etc):
Warning: Cannot modify header information - headers already sent by (output started at /var/www/conversion-matters/wp-config.php:25) in /var/www/conversion-matters/wp-includes/pluggable.php on line 275
This is breaking everything! Anyone know how to resolve this? Was working fine until I tried to install WP-Cache.
P.S Line 25 = define('WP_CACHE', true); and Line 275 = header("Location: $location");