Important Update Fix
This is an important update if you have had any errors relating to the the header being already sent from Breathe version 1.4.
Warning: Cannot modify header information – headers already sent by (output started at /hsphere/local/home/blah/yoursite.com/wp-content/themes/breathe/functions.php:21) in /hsphere/local/home/blah/yoursite.com/wp-includes/pluggable.php on line 850
If you have made changes to the Theme, these will be over written when you update, including the header.jpg. This does not include the changes to the navigation plugin and therefore the navigation bar. If you would like to just fix this problem without updating the entire theme upload the functions.txt file. Rename this file functions.php and save it, then replace it with your FTP in the Breathe Theme. Alternatively cut and paste this into your functions.php file through the admin.

What is this error I am getting, and help would be appreciated?
paulacowan.net
Fatal error: Only variables can be passed by reference in /home/content/c/a/r/carmenco/html/paulacowan/wp-content/themes/breathe/functions.php on line 40