I created a new site, on a new domain, and used the auto-install feature from my cPanel form the hosting company. It installed 2.71, and I used the auto-upgrade feature to update WP to 2.8 before doing anything else. I have installed a couple plug-ins before doing anything, even before selecting a template to use.
When I go to edit the default Hello World message, or create a new post, I get the follow error:
Warning: Cannot modify header information - headers already sent by (output started at /home/fitness/public_html/wp-includes/class.wp-scripts.php:123) in /home/fitness/public_html/wp-includes/classes.php on line 1586
The above is from trying to create a new post, and yet I get pretty much the same message when trying to do anything else, such as edit my profile. It is the second ../wp-includes/*.php that changes when doing something else, reflecting what I am trying to do.
Any help is much appreciated - even if it is to point me to the reported bugs section.