This new FDT version supports the new font abilities of AIR SDK 24. A new Font tab inside the AIR Properties for Android and iOS allows you to select fonts to integrate into a mobile app: In this example the font file TH3_MACHINE.ttf is added and will be packed into the Android app. The warning flag describes that there is no such font installed on this desktop so that the Air Debug Launcher will fall back to the default font during debugging. After the font is manually installed into the desktop operating system and the system fonts are refreshed the warning will disappear.