After re-installing Decor8 on a windows 8.1 machine (after removing some weeks ago), I noticed some "Ghosting" around the tiles when I switched from the desktop to the Metro screen.  It was worse when I minimized the metro tiles.  Didn't see this on my original install.

I tried flipping back and forth several times and rebooting.  Have since removed D8 because it's my production machine.

Don't know if anyone else has had similar experience.  Will try another reinstall when I have some free time.