> How do I get Office to produce a CFBF-based file, one that fails this unzip test? You can save in one of the older formats, for instance in PowerPoint, go to Save As, click Browse, and select PowerPoint 97-2003 Presentation (*.ppt) in the type selection dropdown in the file dialog. I've seen this format used in some professional video production pipelines as well. Still, they have very specific requirements there, so it makes a little sense.