PHP Warning and Output 

I installed a PHP debugger into my Zen Cart because some, not all, pages had a blank page with  these characters.

The debug display the following:
[01-Aug-2009 23:40:21] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/onlywhol/public_html/includes/languages/english/wholesale/header.php:1) in /home/onlywhol/public_html/includes/init_includes/init_templates.php on line 78
[01-Aug-2009 23:40:21] PHP Warning: Cannot modify header information - headers already sent by (output started at /home/onlywhol/public_html/includes/languages/english/wholesale/header.php:1) in /home/onlywhol/public_html/includes/functions/functions_general.php on line 44

The products were uploaded from another Zen Cart account. I only edit the stylesheet.css. I discover the problem 5 days after the upload when I was going from page to page testing the layout.

Looking for some feedback or if someone already have a sloution to the problem

Apparently you have the utf8 BOM in some files, use developer tool kit in admin to search for files that contain it.

Is there a keyword I should be using?

Hold on, I think I got it

Thank you, I got no more error reports.

MODERATOR NOTE: The bug you had in your site is not a bug in Zen Cart. Thus, this thread is being moved out of the Bug Reports section, since it's not a bug in the core Zen Cart software.