Comment 9 for bug 2036597

.config/user-dirs.dirs is rewritten at boot and logout/login and xdg-user-dirs-update after correcting the file and logout/login does not re-create the folders. It's not nautilus-dropbox since removing it does not stop the error from occurring. Attaching a log from a boot where before rebooting I had corrected user-dirs.dirs. When I logged in, my changes were gone and the folders were again links to themselves. Note that Pictures and Documents were not changed to links, probably because these were non-empty.