We've set the 108 pixels x 108 pixels app icon and it renders correctly on the amazon dev website. We've removed and re-added the app, restarted the phone etc but it just wont show up the mobile device! Is that a bug?
Same here; I looked at the icon element in the DOM (under
echo.amazon.com) and the img->src value isn't set - I'm assuming this is a known issue? I might try some more image types/combos - but did the same as you with the png and jpg :)
It doesn't need to be re-uploaded - it should just be included now properly in the app. I'd try recreating a very basic icon - just black background, as a png and upload that to test. Feel free to post a link to your icon herein and I'd be happy to take a look at the file for you and perhaps double-check the format, etc.