I created my own Custom Letter to replace the Standard Letter.  I use borders around category sections. This year no matter what I do the right margin is cut off. I've changed the Page Layout margin size (up and down). I've gone into Paragraph and changed indent to less, to more and the right side is still cut off.

It may work on the Standard P.S. letter but I find that letter sucks. 

No change in printer, no change in any other print settings.

So I agree, this is a problem this year.