Wuala bailing out on "special" folder-names

Hey guys,

I'm using the Backup software ViceVersa to backup my data to my wuala folder (the file-system integration W:). This works fine for almost all my folders and files. However, Wuala doesn't seem to accept those folders that start with special characters (e.g. "--- My favorites ---"). I'm using dashes to make some of my folders appear on top when I open e.g. my "Music" folder.
From a file-system point of view this should work, because those characters are allowed in filenames.
A temporary work-around is to create theses folders via Wuala in advance (e.g. go to "Music" and create the folder "--- My favorites ---". Then ViceVersa works fine and copies all the files.