'Cannot modify header information' but havent changed anything

image66

My site was fine last time i looked at it but today noticed the below error, but i havent made any changes so not sure why.
I'm on version 1.4.1.6 [8326] (Official Build) but have no coding knowledge its all been guesswork so far...

Any advice appreciated
Thanks
Dean

Warning: Cannot modify header information - headers already sent by (output started at /www/sites/610/cfb/www.image66.co.uk/web/themes/my_theme/functions.php:1) in /www/sites/610/cfb/www.image66.co.uk/web/index.php on line 150

Warning: Cannot modify header information - headers already sent by (output started at /www/sites/610/cfb/www.image66.co.uk/web/themes/my_theme/functions.php:1) in /www/sites/610/cfb/www.image66.co.uk/web/index.php on line 151

Warning: Cannot modify header information - headers already sent by (output started at /www/sites/610/cfb/www.image66.co.uk/web/themes/my_theme/functions.php:1) in /www/sites/610/cfb/www.image66.co.uk/web/index.php on line 152

Warning: Cannot modify header information - headers already sent by (output started at /www/sites/610/cfb/www.image66.co.uk/web/themes/my_theme/functions.php:1) in /www/sites/610/cfb/www.image66.co.uk/web/index.php on line 153

acrylian

Check the file/folder permissions maybe your host has changed something. Also please search the forum as we had this quite some times.

sbillard

Look into your theme's `functions.php` script. I would guess from the error that a space or blank line has been inserted at the beginning of the file.