--- a/src/gnome-desktop/gnome-desktop-thumbnail-script.c	
+++ a/src/gnome-desktop/gnome-desktop-thumbnail-script.c	
@@ -576,7 +576,6 @@ add_bwrap (GPtrArray   *array,
 	    "--dev", "/dev",
 	    "--chdir", "/",
 	    "--setenv", "GIO_USE_VFS", "local",
-	    "--unshare-all",
 	    "--die-with-parent",
 	    NULL);