title: kasra not displayed on iOS
body: <p>When I write arabic text containing the letter kasra (unicode character 0x650, phonetic equivalent i) to a button, the kasra is not displayed. Thus, the word mumkin appears as mumkn. If I inspect the NSString in Xcode, the kasra is present, but the kasra is not displayed in the iPhone simulator or on a real iPad. The other two short vowels (fatha and damma) are displayed correctly.</p>