I have installed a few ploggers on a few sites and this is the first time I have this error.
I have read the other forum discussions on headers but this one is a standalone and I can't find any discussions about it.
Warning: Cannot modify header information - headers already sent by (output started at /home/sites/site179/web/download2/plog-config.php:10) in /home/sites/site179/web/download2/plog-load_config.php on line 26
Content headers identify to the user agent (browser) what to do with the following information, eg. text/html, application/xml+xhtml, image/jpeg. However, they absolutely must come before anything is outputted to the page, because once the headers are sent, "The show must go on!" and the content is sent. You cannot send headers, begin the content, and send more headers. This is what PHP is saying. In essence, "Too late! We already started sending content!" What is likely happening is PHP is echoing something (even whitespace, the most common culprit, like extra lines in a PHP file).
There are some other reasons, but first check that the plogger include is the absolutely first line in your file. Also, looking at your page source, there's a "<br />" that comes out of nowhere that precedes the PHP warning. I'm going to say that this is almost assuredly the culprit. (I don't think PHP would prefix the error with a line break, but if it does, the problem is somewhere else.) Find him, fix him, and you have your answer.
I can see the page break in the browser source but can't find it in my files. Browser source as follows;
<br /> <b>Warning</b>: Cannot modify header information - headers already sent by (output started at /home/sites/site179/web/plogger/plog-config.php:10) in <b>/home/sites/site179/web/plogger/plog-load_config.php</b> on line <b>26</b><br /> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">