On Windows systems, the dot separators specified in the
per-site output directory names are not handled
correctly. The plugin reports some files are written,
others report FileNotFoundException. Actually, no files
If you create the relevant site directory manually before
running the spider, the files are written correctly.
So far, I can't see whether this is a problem with the
plugin ensureFolder and ensureFolders methods, or
creating such directories in Java per se.