Strange iPhone application icon view in the iTunes's Applications section

When I drag 'My iPhone App' application's file into iTunes it has proper view. Rounded corners and transparent background.

Then I close iTunes a开发者_如何学Cnd open it again. Corners are still rounded but... What has happened with the background?

Icon is a project's resource file named 'iTunesArtwork' with dimension 512x512, PNG format.

The icon needs to be 57x57 png. Not 512x512.

Looks like a bug in iTunes. Try to update to latest one.