I just picked this monitor up today.... after being frustrated with an a90f that didnt save the OSD settings. Now the actual visual size on this monitor is different on the left side compared to the right side. The right side is about 2mm smaller than the left side, even when I put it into a perfect a square as I can... is this monitor simply defective? or is there some setting I'm missing? or something else I can do about it ? thanks