Prints from Safari Reader crops edges

Hello,

printing from Safari Reader to PDF or paper results in cropped edges, meaning that text is being cut off (not printed) on all sides. The preview in Reader looks fine. Changing margins manually in the printer's dialog is being overriden and so is changing the output size to e.g. 90 percent. Happens with 2 different printers.

The printer's manufacturer tells us it's an Apple problem. Seems kind of a flaw if you build in a reader function only to have text cut off as a result…

Any hints on how to correct this are warmly appreciated!