iTunes search API returns different app icons for 60x60 and 1024x1024 At first, I have to say that I am not sure whether I should ask this question on stackoverflow or on AskDifferent. I decided to use AskDifferent because this question is not programming-specific.

My question:
I use the iTunes search API to get information about some apps. I use the iTunes lookup (http://itunes.apple.com/lookup?id=[some app id]) URL to get this information. The return dictionary contains two links for the app icon:  


artworkUrl60  
artworkUrl512  


The urls after the specific links point to the app icon.
The problem is that the image returned for the artworkUrl60 key is not the same as the image returned for the artworkUrl512 key.  

Example: (I'm sorry that the second image is so much bigger, that's because it's the big artwork)
Vizzywig 4K
artworkUrl60: 
artworkUrl512:
Apps can have different artwork. Whilst Apple recommends simply scaling your app icon for iTunes Artwork, there's nothing preventing them from being different images.