I bent my cover too a little bit but I really don't think that is what makes this "scratch" there. And I took the cover off only once (to look at it when I saw your pic
It was there from the beginning.
What I also recognized is that this phone rattles quite a bit! Not only when shaken... just when moves or turned it rattles. This is probably the keyboard mechanism/slide but this is the first one that makes this noise this much and loud! By the way, this is my 6th or even 7th phone. All priors except 1 got the crack!!! The one that didn't get the crack after weeks, I just thought... (wrong perhaps!!!) that since that one was a 08W51, if I get a 09 model I would be even more safe...! I was very wrong. My last one was 09W03 and got it after 1 week!!!
And now another thing I found: the battery has changed! It states now some strange line saying its 1450maH / 1500 ! What the heck...! I will see if this makes the battery stay cooler but they should have increased the power not reduced it!