I also experience this problem. Desktop PC, Intel i7-4790K CPU, GeForce GTX 760 GPU, Ubuntu Gnome 17.04, 64-bit, Nvidia driver 375.66.
But I have noticed something potentially important. Colors (but not black and white) are inverted when choosing "grab the current window," but NOT when choosing "select area to grab."
I also experience this problem. Desktop PC, Intel i7-4790K CPU, GeForce GTX 760 GPU, Ubuntu Gnome 17.04, 64-bit, Nvidia driver 375.66.
But I have noticed something potentially important. Colors (but not black and white) are inverted when choosing "grab the current window," but NOT when choosing "select area to grab."