The current version of PowerFlasher's FDT Flash IDE prints out several warnings and errors when you want to compile Starling.
Thankfully, you can easily turn off the errors and warnings in FDT 5. The tricky thing is to find the correct settings.
You can do that either globally for all FDT projects, here:
FDT - Preferences: FDT / Problems / AS3 Problems
or only in the settings of the Starling project:
Project Settings: FDT Problems / AS3 Enable project specific problems
Change the following settings to “Disabled”:
Type Problems Types are not compatible Unresolvable Unresolvable variable reference Unresolvable variable reference in E4X Unresolvable member reference in dynamic object Declarations Parameter is never used