So I took my iPad out of the Apple case today to clean out of some funk that gets trapped around the edges. This is the first time I've taken it out since applying the Zagg Invisible Shield. (Still Waiting on my PS Anti Glare Front) Once removed I noticed this It appears to be only on the Invisible Shield and not the back of the iPad. I'm wondering if this is happening to back of anyones iPad and going un-noticed. I've had my iPad in the case since the launch and the Invisible Shield for maybe half that time. If you have yours in the Apple case, maybe pull it out and give it a look.