This is going to sound weird, but is your wifes phone set to a non US english (even something like australian/british english) language ? I found the same prob

This is going to sound weird, but is your wifes phone set to a non US english (even something like australian/british english) language ? I found the same problem with my phone a long time ago for a non US english account. Once i had that configured differently than what my setting was on the app store it would do all kinds of stupid things with the artwork.