Don't know if it's the same message, but I suspect it's got to do with NTFS alternate data streams a program might use. Got a data stream warning a few weeks ago when trying to copy a file.
But this is a known FAT32 limitation.
Question to the developers is generally if the underlyning CBFS offers NTFS for the virtual FS as well and - if so - if it would still be compatible with fuse.