Yeah, there have been reports of other QT apps developing bugs after CSSU. Maybe this is related. Transtech and Msameer, are you guys not using CSSU?

As for the font, can you please explain where/what the errors/mismatch between font and text are? My google-ing tools arew at the ready, and maybe I can help you to find a solution. I mean, aftarall, there are plenty of Quran apps for iOS, android, symbian, etc which work correctly. So a solution MUST be there.