Comment 28 for bug 365242

Another option is to jump through symlink only once if that symlinks is placed somewhere in "~/Ubuntu One", excluding references to any "~/Ubuntu One" subdirectory.

If there is a symlink somewhere inside that linked directory it should not be followed, but stored in Ubuntu One cloud as a symlink, so it can be restored as is.

So, it's a filesystem-centric way to configure which directories one want to sync. It may be more natural to someone then GUI with directory list.