Once you have created a favicon, you will need to upload the favicon.ico to your Graffiti CMS installation and place file in two locations to ensure that it is displayed properly throughout your site.
1. The Root folder of your website
2. The \__utility\img folder off of your root site
The 2nd place is used for the dynamically built pages of your posts since they do not use the root image.
If after your replace the image, and you still see the original image, please be sure to clear your browsers cache as it might not pull the updated file right away.