In Icenium Graphite , when a new project is created using jQuery template, jquery-mobile/images folder does not contain ajax-loader.gif even if it is contained in the original jquery.mobile-1.1.0.zip.
Nice catch. We will definitely include the missing file in the default jQuery mobile template in the next update of the product.
It seems the jQuery team eventually have decided to use gif instead of png for this file and we have missed that while upgrading from a previous version of the framework.