One of the latest features I’ve added to my Techozoic theme was infinite scroll support for the Jetpack plugin. It’s a great feature and fairly easy to integrate. One snag I ran into was after testing with Jetpack enabled and releasing the update I had numerous reports of the archive pages being blank. This was a stumper because I hadn’t changed anything with the archive pages, and the archives worked perfectly fine on my test site with Jetpack enabled. I finally figured it out installing the theme on another site, and seeing the problem first hand.
The root of the problem is the way the infinite scroll uses the get_template_part function. One of the steps to enable infinite scroll support is to make sure that the template part is named content-(post-format).php. I had a different naming convention before implementing this feature and this was the whole problem, I had forgotten to change the get_template_part function on the archive page, so it was calling a nonexistent template file. The infinite scroll module during the ajax request calls the template part using the content-(post-format) name which is way it would work with Jetpack activated.