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?

http://www.freeimagehosting.net/uploads/15fee337bc.png

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

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

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