2010/1/11 Ulrich Dirr <ud at art-satz.de>: > If you want to produce files that conform to ISO standards like PDF/X-3 > (which is widely spread in printing industry) or PDF/X-1a (mainly for > archiving purposes) files in PDF 1.5 won't pass. That's why PDF/X-4 (which allows PDF 1.5) was invented. :-) Best Martin