I received the three MCE's I just ordered. There is a problem with one of them. It looks like the dome is melted or crystalized on one side.
I took a photo of the strip of LEDs before opening the compartment. It was hard to photograph the detail but you should be able to see on the far right compartment a clouding of the edge of the LED.
After removing the LED I took another photo:
The deformed area actually partually covers two of the die inside the dome.
Can I return this MCE for a replacement. If so, I will gladly send PayPal for three more, for you to include the replacement with.