spring-webflow-booking build fails (using "clean servlet-profile" ant targets):

compile:
    [javac] Compiling 16 source files to C:\svn\ossrepo\icefaces4\trunk\icefaces\tutorials\spring-webflow-booking\build\classes
    [javac] warning: [options] bootstrap class path not set in conjunction with -source 1.5
    [javac] C:\svn\ossrepo\icefaces4\trunk\icefaces\tutorials\spring-webflow-booking\src\main\java\com\icesoft\spring\security\WebflowListener.java:66: error: method determineWindowID in class WindowScopeManager cannot be applied to given types;
    [javac] WindowScopeManager.determineWindowID( fc );
    [javac] ^
    [javac] required: FacesContext,boolean
    [javac] found: FacesContext
    [javac] reason: actual and formal argument lists differ in length
    [javac] Note: C:\svn\ossrepo\icefaces4\trunk\icefaces\tutorials\spring-webflow-booking\src\main\java\org\springframe
work\webflow\samples\booking\LazyDataModel.java uses unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
    [javac] 1 error
    [javac] 1 warning
BUILD FAILED