I tested my touchscreen accuracy by drawing straight lines over the S Note grid background using a plastic ruler and the S Pen. Not just for fun, I had found my handwriting and sketches were terrible in certain parts of the screen. Over most of the screen I got nice straight lines exactly where I placed them, but at the edges near to the camera/sensor and also near the Samsung logo I found the lines warped away from where the pen had been. When I'd built up a number of lines in a grid I found what looks like 2 bulges if you imagine contour lines on a map. This is making note taking a real pain, so it's going back to the shop for replacement or repair. Has anyone got any idea why this has happened? I think it has done it from new but it was not until I drew lines with a ruler I saw how bad it was and there is a shape to it. Could a screen protector influence it? I do not want to remove it to check as it a sod to put on, it's a proper 10.1 screen protector that appears to be fine I have saved the s note file and exported to jpg but don't know how to show it on a forum as I'm new to forums. Thanks Chris.