You have to specify all the files to include in the package. How you do that depends on the tool you are using to create the AIR package. Are you using Flash Builder, Flash Professional, or the command line?
Im using Flash builder 4.01.
Interesting thing is that flash builder include other files, if I rename file to resource.propertiesXX it includes it into package. What is so special with resource.properties files that they ommited from package?
Any ideas? I seems to be flash builder decides what to do wit resource files.