Warning cannot modify header info

Hmm recently starting having this error come up if I visit http://vladimirdruts.com however http://www.vladimirdruts.com has no issues.

Any ideas? :0

Warning: Cannot modify header information – headers already sent by (output started at /home/vladim10/public_html/index.php(1) : eval()’d code:7) in /home/vladim10/public_html/wp-includes/pluggable.php on line 866

THANKS! 🙂