I have an issue with unicode characters not showing up on some computers. The unicode text shows correclty within an AIR application on some computers and not on others. Both are Windows XP. The same text shows correclty with MS Word, IE but not when running on AIR. Is it possible that the AIR runtime is an older revision on those computers that can not represent it correctly?
I wouldn't think that is a problem.
Are you displaying double-byte characters, and if so, are the proper fonts available? Are you embedding character ranges?