We are currently working on a small project to create an AIR desktop application in Flash Builder 4.6 using Flex SDK version 4.9.1
Everything works perfectly fine when running and debugging but as soon as we try to export Release Build yellow question marks appear, saying "The import ... could not be found.", "Type was not found or was not a compile-time constant: ..." and "Access of undefined property ..." and the resulting application doesn't work. The only way to remove those question marks is to open each file that is marked and resave it with no changes to the code (e.g. type and remove the space). When we try to export Release Build again - the same thing happens.