I added places to my 'Home Folder' quicklist in 11.10, I believe following these instructions and ended up with duplicates once that feature became standard in 12.04. I tried this solution, removing /usr/share/applications/nautilus-home.desktop and reinstalling nautilus, but that didn't work. I've already upgraded to 12.10, but have just ignored this problem since it came up.
I'd like to know how to remove those duplicate entries and I'd also like to know how to add other directories to the quicklist, specifically one or two commonly accessed sub-directories of my Documents folder. Any help is greatly appreciated!