I upgraded from 15.5.1-15018445 to 15.5.6-16341506 on Windows 7 and since then I'm seeing weird graphics corruption in my Ubuntu 16 guest VM. I have a snapshot that I resume and if I leave it on in the background eventually I will switch back to it and graphics nonsense will show. The bad graphics data seem to be from the guest. In the screenshot below you can see distorted text but I've also seen icons. If I switch windows in the guest and then go back to the problem window then the graphics will go back to normal. The snapshot is from July 26.
