So I have finally discovered (many thanks to you guys/gals) that my "Warning: Cannot modify header information" issue is due to 'white space'. It appears that an extra line has been added before the <?php and now I am going through and deleting them. However, it appears to be an issue with almost every .php file in every plug-in, wp-config php files, etc. Have I been hacked? And is there anyway to do a global fix? Or is this a one by one problem, and I need to make more coffee?