When creating a note or a typewriter entry in side an Okular document, and writing Arabic language inside, the Arabic writing is invisible. English language works okay.
STEPS TO REPRODUCE
1. Open a pdf document. Press 'F6', or 'Tools' > 'Review'.
2. Insert a new note, or a Typewriter entry.
3. Write an Arabic text. You can include English text.
4. Save note and close it. The Arabic text is invisible. Any English text is visible.
The Arabic text is invisible inside notes.
The Arabic text should be visible.
Linux/KDE Plasma: ArchLinux, Awesomewm, Okular 1.10.1
*** This bug has been marked as a duplicate of bug 305534 ***