Just an update ... after nearly 2 weeks of waiting they rejected for the second time the photo. This time they explained in more detail that it needs to be a clear 2x2 photo. Not sure what clear means, perhaps the resolution needs to be high enough but they did not specify. Our photo already was 2x2, so I increased the size to 1200x1200 pixels. They further stated that it should NOT be a passport photo and the ear (ears?) needs to be visible. This is something not mentioned anywhere. Very frustrating