I use a background for notebooks in my physics interactive lecture notes / etext. This seems broken in 14.2. I want an off-white background to be visible on the screen but not to print. If in the Options Inspector, I choose the notebook option: Background->RGBColor[0.96, 0.96, 0.94] it works for notebooks on screen but the notebooks print (and generate PDF files) with that background. To prevent the background from printing, I use in my notebook stylesheet: Cell[StyleData[All, "Working"], Background->RGBColor[0.96, 0.96, 0.94]] (and do similarly for the "SlideShow" environment). This is now broken and the background is white.