4f4e9508_scanned_documents___D__Kriesel__What_happened
[Date] August 12 [What happened] 
Xerox scanning issue fully confirmed. They indeed implemented a software bug, eight years ago, and indeed, numbers could be mangled across all compression modes. They have to roll out a patch for hundreds of thousands of devices world-wide. On one hand, the implications might be of vital significance for Xerox now. On the other hand, I am glad not to go down in history as the guy too dumb to read the manual. Here is their press statement.
Xerox scanners/photocopiers randomly alter numbers in scanned documents · D. Kriesel
What happened