After having an issue with the new version of Gnome's nautilus breaking the wallpaper, I uninstalled and went back to the version included in Ubuntu 13.04. After a successful reinstallation, the quicklist functionality in the launcher is no longer present.
Along with the quicklists not working, neither are services such as Gnome's Sushi.
I've looked at other similar threads that offered no solution. Does anybody know how to fix this?