I had a similar situation and this is how I solved it. I'm not smart enough to figure out how or why it worked but...
I brought up the "Calibration 1X1" and saw that there was no shade. Then I brought up the "Calibration 2X2" and saw there was a shade, which I corrected. When I removed the 2X2 and brought it up again,though, the shade returned. No matter how many time I removed the shade, it would return. So I went back to "Calibration 1X1" and tapped the down arrow (the 2X2 had a shade in the bottom), a few times. Not only was there no shade in the 2X2 but the images showed up when I activated my widget.
Hope that helps