I have installed jQuery mobile locally.
When I invoke the method : $.mobile.showPageLoadingMsg(); I receive an error message :
css/images/ajax-loader.gif 404 (Not Found)
The file css/images/ajax-loader.png does exist. Should this method not be referring this file instead ?
A possible solution is for me to just add my one ajax loader with same name, but it should work out of box ?
Here’s an answer to your question Why does jQuery Mobile 1.1-rc1 use a .gif for the loading icon (again)?.
Animated gifs simply are more supported then CSS animations, but you can switch to PNG if you like. jQM simply defaults to .gif