Just checked my 10 days old black translucent cover:
Cracks in the lower 2 corners, too :(, like on your photos.
Thank you for pointing me at this problem! I will try to give the cover back and get a refund for it.
I didn’t open it after the first assembly until I found the cracks. Also I can’t remember that it ever fell down in the last 1-2 weeks.
Here are 2 photos, but it’s hard to find the cracks there, it’s easier with your own eyes (photos made with also new 12 MP FP2-camera - could be better, but no chance even with manual focus :/):
-> For better quality/resolution click on the photos above.
I just thought a little about possible reasons and remember one, which maybe was already mentioned with the first translucent covers, I think:
Too much pressure, when in a pocket of your trousers.
What do you think?