I've found out using Adobe Reader that problematic page has not embedded font Palatino-Roman. I've downloaded it from here
font.downloadatoz.com/download,55787,pal...-th-for-windows.html (even if I need to pay for it I prefer first to check that it works) and added to assets folder as PR.ttf. And here's the code I added to Global.Init() function:
fontfileListStart();
// esisting code
fontfileListAdd("/system/fonts/DroidSans.ttf");
fontfileListAdd("/system/fonts/Roboto-Regular.ttf");
fontfileListAdd("/system/fonts/DroidSansFallback.ttf");
// added code
fontfileListAdd("/assets/PR.ttf");
fontfileListEnd();
setDefaultFont(null, "Palatino-Roman", true);
But it doesn't help me. Looks like I'm doing something wrong like using wrong font or declaring wrong fontfamily. I've already sent you the problematic page so maybe you can point at the mistake.