SHA1 for qtbase is: 6c21f42657b494e24112c90d8b9fff719f1f8791
Then trying to provide missing info for this bug:
QTBUG-32806, was found that on latest stable Qt5.1.2, system tray icon doesn't show icon.
Icon is shown, as one vertical line. You can look at attached screenshot. screenshot was made, using "Systray" example from Qt5