Barry’s tax return’s pdf document properties released just weeks before the LFBC pdf shows it was created on a Xerox 7655. That could have been a copier at his CPA’s office, I suppose, but I would think it would likely have been at Barry’s WH legal office, IMO, which would have final control over release of such a sensitive document, yet bungled the digital redaction by not flattening the file...not unlike the LFBC pdf.
The industry standard compression software used by the Xerox family of WorkCentre copiers (not just the 7655), is MRC, which dates back to circa 1999. It is the mixed, on-the-fly compression method selection that NBC claims to be present in the WH pdf and to have replicated by her.
http://en.wikipedia.org/wiki/Mixed_raster_content
“Mixed raster content, or MRC, is a method for compressing images that contain both binary text and continuous-tone components, using image segmentation methods to improve the level of compression and the quality of the rendered image.[1] By separating the image into components with different levels of compressability, the most efficient and accurate compression algorithms for each type can be used.
“Generally, MRC is wrapped into a hybrid file format which supports markup language such as XML, allowing for multiple images and the directives to properly render each to be stored within a single file.”
MRC is part of the JPEG international standards:
http://en.wikipedia.org/wiki/Joint_Photographic_Experts_Group
If MRC is the "industry standard" that goes back to 1999, and is only the reason for the errors and anomalies, then other makes and models made by other companies should show the same errors as the Xerox 7655.