Why does my sprite not work on iOS/Android, but works fine in Safari/Chrome?

The images in question are on the bottom toolbar when you select a photo and then tap it to bring up the toolbar. It's perfectly positioned in Safari, but nowhere in sight in mobile safari. Here's an example

Any开发者_运维知识库 ideas?

Thanks!

---

The problem is: in http://www.foodtrucksmap.com/mobile/photoswipe.css on the line 160 you overrided the http://www.foodtrucksmap.com/mobile/images/photoswipe-icons.png image with the address for HQ-icons (http://www.foodtrucksmap.com/mobile/images/photoswipe-icons@2x.png) which is getting 404 error.

So, the solution is to put the needed image where it must be or remove these styles so they wouldn't override the non-HQ image's address.