I have no idea... works for me every time. Check your .ioFTPD.debug file for clues...
One idea is that you have defined non-standard bar which sometimes contains invalid characters: I seem to recall you could have such problem if you try to put "genre" on your bar, because when movie has more than one genre they are separated by "/" char, which windows won't let you use in a file/directory name. Another potentially dangerous character is ":"
HTH
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