One Windows user ran into an issue in which embedded images in a Word document would appear fine in the print preview but then would print zoomed in and cropped. In other words, the area on the printed document where the image should be is the same size as the image should be but only part of the image is printed inside that area but zoomed in and pixelated.
In this situation, saving to PDF would allow the user to print it properly.
Turns out the fix was even easier than that: the documents had been created in an older version of Word, and they were saved as .doc files. Once the user saved them as .docx, everything printed just fine.