I just upgraded to a Wacom 32 tablet and am having this problem only in Indesign. There are random little grey squares all over the page - and not just the file window but the entire "artboard" area. Other apps are not doing this. I've tried zooming in and out, display quality settings, nothing has helped. And it's not an image issue - it's basically a display issue. I have no idea how to fix this and I'm almost rendered unable to do at least 50% of my job as I'm not just an illustrator but a designer too. The monitor otherwise works fine and it seems to be InDesign-specific. See screenshots attached.