The bug is when you finish writing a word in Arabic and after pressing the space-bar to add new word to the sentence, the space moves the previous word to the left and once you start typing the new world the previous word will move back to its position. As you continue writing a complete sentence, some character disappears.
*** This bug has been marked as a duplicate of bug 92710 ***
(In reply to Alex Thurgood from comment #1) > > *** This bug has been marked as a duplicate of bug 92710 *** Are there any plans to fix this bug?