README: Added hint to use at least version 1.15 of MuPDF.
@@ -41,6 +41,10 @@ INTRODUCTION
(if in the actually used Poppler version such options are
available). This is the case for most modern Linux distributions.
+ If you use MuPDF as PDF renderer make sure to use at least version
+ 1.15, as the older versions have bugs and so some files get not
+ printed correctly.
+
For Apple Raster output (used by AirPrint printers) at least CUPS
2.2.2 is required.
