LibreOffice is commonly used as part of a system to convert and generate previews for MS Office files. I would assume it has something to do with thumbnail gene

LibreOffice is commonly used as part of a system to convert and generate previews for MS Office files. I would assume it has something to do with thumbnail generation or preview generation. However I don't seem to see thumbnails or previews of .Doc files (I do for images - for example) on the dropbox webapp - so maybe it's something their testing?