I got a 9100 for my wife about a month ago and she brought the dust issue under the screen to my attention a few days ago. I put a scheen protector on soon after she got it. No scratches on the screen, but dust berween the layers of glass/plastic of the screen. From the desrcription of the issue, it is a design defect which lets dust get in between the layers of glass/plastic of the screen. I have had other Blackberry's for years and my wife has had cell phones for years also and we have never experienced this issue of dust under the screen before.