Here is the problem.
% apt -X
  -XListAnnotationTypes List found annotation types
  -XListDeclarations List specified and included declarations
  -XPrintAptRounds Print information about initial and recursive apt rounds
  -XPrintFactoryInfo Print information about which annotations a factory is asked to process
  -XclassesAsDecls apt or javac message file broken: key={0} arguments={1}, {2}

Expected message string seems:
apt.opt.XClassesAsDecls=\
    Treat both class and source files as declarations to process
###@###.### 10/15/04 04:37 GMT