I recently purchased a RX470 graphics card and I'm seeing some odd graphics corruption:
These weird blue markings flicker if the mouse cursor passes over the menu and changes hover highlighting.
Also, in 3D applications there is odd shimmering in post-effect rendered items and overlays, but I don't have a screenshot of it.
I removed the new card and reinstalled my old one, and everything is back to normal.
I'm currently using version 16.12.1 of the driver/software. If needed I can reinstall the card and get a fresh grab from the settings application.