I have also had this issue with my phone. 8 days after I had bought my phone I noticed at least 6 hair line cracks in the plastic bezel in casing the phone and I had definately not dropped it. the cracks are not even consistent with a typical fall onto a hard surface.
I wanted to cancel the contract and/or get another phone as hearing of this issue and how prevalent it is means to me it will almost certainly happen again.
I was told as I had fast track upgraded to this phone that I only 7 days to exchange or cancel.
It's off for repair now via O2 - still feeling like i deserve the option to cancel or at very least get a black one, but after hearing of the issue with these I am less than happy with the situation.
