Ok, don't know if this will help at all, but here goes. In this screen cap, you can see 3 images. the two on the right are at 100% view. I used my wacom (stock settings) and scribbled some circles. These to are at 72 dpi and 300 dpi respectively, and the lines are smooth. The image on left is 1500x1500, and in the window shows at 33% or so....you can see how raggedy the circles are. Only when viewed at 100% will they look OK.... is this the prob?