I have Awesome window manager running on a Manjaro-running desktop with nvidia GeForce GTX 750 card using non-free nvidia drivers.
The machine gives off a visual anomaly when scrolling through text, both in a tiled window, or full screen. The anomalies also show up playing video. The anomaly is a horizontal band of "ripples" that appears in the middle of the screen. As I write this post, the ripple does not happen when I scroll in the "body" text edit window of the Stackoverflow page, but does appear and distort text in that text edit field when I scroll a comparable amount using the slider on the right edge of the browser window, scrolling the whole page, not just the post text. I do not remember seeing such an anomaly when running Linux Mint with the cinnamon desktop environment, but it did happen when I added Awesome wm to that Mint install. I run two monitors and the effect happens on both. Note that this anomaly does not happen on another Awesome-running machine I have, so it's not inherent to the window manager.