iTunes Connect says my Icon.png file is 0x0.. it's clearly not!

In my project directory, t开发者_JAVA百科op level, I have Icon.png. Double-checked in Photoshop, it's 57x57. When I submit my application via iTunes Connect or Application Loader, I get an error message saying my icon file is 0x0. Any idea why this happens?

0x0 icon error i resolved by changed Compress PNGS to NO in project -> build settings

This can also be caused by a change in OS X 10.7.3. The fix in this case is to download the latest version of the Application Loader.

It's probably better to set the file type of your icons to "Icon" than to turn off Xcode's PNG compression globally.

Perhaps you've fixed this by now, but could it be related to the fact that you're saving in Photoshop, with a whole lot of metadata in there? I would suggest opening it in Preview (assuming Mac) and then saving it again, or perhaps saving as another (lossless) format and then back to the original file.