Quote Originally Posted by afo View Post
If the developers tool kit finds the file, it's there, but it doesn't mean you have to change that particular file.

For what you want to do, edit includes/languages/YOUR_TEMPLATE/english.php (where YOUR_TEMPLATE is the name of your custom template) around line 83 and change what I've highlighted in red.

Code:
// categories box text in sideboxes/categories.php
  define('BOX_HEADING_CATEGORIES', 'Categories');
Perfect. Thank you so very much. I owe you guys so much coffee when I finally finish this site.