I've been running Fedora 13 beta and found that the button nautilus has provided for toggling between path as buttons and path as text has been removed. Found this upstream bug: https://bugzilla.gnome.org/show_bug.cgi?id=605608 and some further discussion: https://bugs.launchpad.net/nautilus/+bug/382626 This should be mentioned in the release notes.
Additional discussion: https://bugs.launchpad.net/ubuntu/+source/nautilus/+bug/508632
fedora-release-notes-13.2-1.fc13 has been submitted as an update for Fedora 13. http://admin.fedoraproject.org/updates/fedora-release-notes-13.2-1.fc13
fedora-release-notes-13.2-1.fc13 has been pushed to the Fedora 13 stable repository. If problems still persist, please make note of it in this bug report.