I just did a fresh install of Ubuntu 13.10 (actually, I've done two fresh installs, hoping that trying again would get this working).
I don't seem to have the ability to add or remove bookmarks from Nautilus. The ones that are there by default (Home, Desktop, Documents, etc.) work fine. I can right click on them and rename them. However, I cannot remove any of them. The option is there "Remove" but disabled/grayed out.
The same is true if I try to add bookmarks. I go to "Files -> Bookmarks", and all the bookmarks show up, but the buttons at the bottom to add, remove, or re-order the bookmarks are simply disabled.
What am I doing wrong?