Erick Hitter on "[Plugin: Jetpack by WordPress.com] Infinite Scroll - {"type":"empty"} as response to ?infinity=scrolling&action"

Does your theme's header.php include a call to the wp_head() function? Jetpack uses that function to output the information needed for each Infinite Scroll request, and if that variable isn't available, Infinite Scroll cannot function.

If wp_head() isn't present, you'll need to add it just before the </head> tag in your theme.

If wp_head() is present, can you:

1. Temporarily enable Infinite Scroll
2. Load your site's homepage
3. View the source for your site
4. Provide the source via a service such as Pastebin
5. Disable Infinite Scroll

Thanks!