Originally Posted by PoP
I'm a bit confused. Didn't you embed the fonts in post#5 attachment?.
I did. But for some odd reason, Kindles don't use the Arabic glyphs, when you embed Arabic fonts. (If you mix Latin and Arabic text, the Latin glyphs actually show up.)
That's why I didn't embed fonts in my latest test file.
Also since I figured out that Arabic vowel signs are supported up to a certain font size I created a new test file without embedded fonts.