I am receiving this warning in the back and front ends of my WordPress install: "Warning: Header may not contain more than a single header, new line detected. in /home/aperture/public_html/wp-includes/link-template.php on line 2443".
I deactivated all plugins, yet this warning still appears, so I don't believe it is aplugin issue.
I have tried repairing, optimizing the database, deleted, cleaned up the root directory, but nothing works. I never modify the core code.
Thank you for your time and assistance.
Kevin