@Jeremy, Yes, after restarting all Nautilus instances (actually just killing it did the trick) the problem is solved. Though seemingly only affected the Adwaita GTK+ theme as changing it to the Numix one fixed the issue.
** No longer affects: gnome-shell (Ubuntu) ** Also affects: nautilus (Ubuntu) Importance: Undecided Status: New ** Changed in: ubuntu-gnome Status: Incomplete => Fix Released ** Changed in: nautilus (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to nautilus in Ubuntu. https://bugs.launchpad.net/bugs/1586655 Title: Background grey even though set to image and image is displayed elsewhere To manage notifications about this bug go to: https://bugs.launchpad.net/gnome-shell/+bug/1586655/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs