I am also having issues with AIR SKD 25 Relase.
I did not have time to test it thoroughly but I am 99% sure that it is because of custom embedded font with text input.
When I open window in my game were I have text input with custom embedded font the app quits unexpectedly. I even tried to debug on device but no error is thrown. The app just quits and that's it.
Everything works fine with AIR SDK 25.0.108 Beta and I am using Beta since it works great on iOS and Android.
Josh did you tried to use custom embed font on a text input with the release version of AIR SDK 25?