Sabayon bug 2797, reported by micia.
--- a/data/nautilus.desktop.in.in
+++ b/data/nautilus.desktop.in.in
@@ -91,7 +91,7 @@
 Icon=system-file-manager
 Terminal=false
 Type=Application
-StartupNotify=true
+StartupNotify=false
 OnlyShowIn=GNOME;Unity;
 Categories=GNOME;GTK;Utility;Core;
 MimeType=inode/directory;application/x-gnome-saved-search;