Comment 5 for bug 1224621

Nautilus, is the official file manager for the GNOME desktop, so it might suggest Unity packages but it should not depend on them. The implementation can be made in such way that when Unity is not installed, there should not be a problem.

Same goes for empathy and thunderbird-gnome-support. Ubunty should give its users more freedom in choosing that to install and not push Unity (I have seen too many hard dependencies) or it is going to loose users to e.g. Debian.