I can't use the new Dropbox transfer for a list of files when one of them is empty. It seems to process everything up till the empty file, then fail. I fixed it by adding a little text to the file (I was using the file name as a note to the next person to look at it), but I would expect it to work. I'm not sure if it's related, but I recall in my time having an issue with a zipping algorithm not handling empty files, but it wasn't too hard to fix. Hopefully this helps.
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