Bug when unload module containing wizard

Hi

I'm using Cairngorm Navigation Library in a modular application. One of them contains a Cairngorm 3 wizard. Like the sample in svn, the context is initialized with the wizard and a PM class (as MessagesPM) :

[Landmark(name="myWizard")]
    public class MessagesPM
    {
        private static const LOG:ILogger=LogUtil.getLogger(MessagesPM);
        [Bindable]
        public var message:String="";
        //------------------------------------------------------------------------
        //
        //  Enter/Exit Methods
        //
        //------------------------------------------------------------------------
        [Enter(time="first")]
        public function firstEnter():void
        {
            message+="First enter\n";
            LOG.info("content.messages:FirstEnter");
        }
        ...

When I unload this module with ModuleLoader I have this error :

ArgumentError: Error #1063: Argument count mismatch on com.adobe.cairngorm.navigation.landmark::AbstractNavigationDecorator/preDestroy(). Expected 2, got 0. 
     at Function/http://adobe.com/AS3/2006/builtin::apply()
     at org.spicefactory.lib.util::Delegate/invoke()
     at org.spicefactory.lib.util::DelegateChain/invokeChain()
     at Function/http://adobe.com/AS3/2006/builtin::apply()
     at org.spicefactory.lib.util::Delegate/invoke()
     at SynchronizedProvider/invokeDestroyHandlers()
     at org.spicefactory.parsley.core.registry.definition.impl::DefaultLifecycleListenerRegistry/invokeDestroyHandlers()
     at org.spicefactory.parsley.core.registry.definition.impl::SingletonLifecycleListenerRegistry/destroyProvider()
     at org.spicefactory.parsley.core.registry.definition.impl::SingletonLifecycleListenerRegistry/postDestroy()
     at org.spicefactory.parsley.core.lifecycle.impl::DefaultObjectLifecycleManager/processLifecycle()
     at org.spicefactory.parsley.core.lifecycle.impl::DefaultObjectLifecycleManager/doDestroy()
     at org.spicefactory.parsley.core.lifecycle.impl::DefaultObjectLifecycleManager/destroyAll()
     at org.spicefactory.parsley.core.context.impl::DefaultContext/contextDestroyed()
     at flash.events::EventDispatcher/dispatchEventFunction()
     at flash.events::EventDispatcher/dispatchEvent()
     at org.spicefactory.parsley.core.context.impl::DefaultContext/destroy()
     at wizardModules::Module1/destroyContext()
     at wizardModules/removeModule1()
     at wizardModules/___wizardModules_Button2_click()

But after this alert, the module is unloaded and I can reload it without problem...

If I remove the PM from the context, my wizard works perfectly in the module and I don't have anymore this error when unloading module.

If I initialize the PM in the parent application context, it works too.

The problem is that I want to declare this PM only in the module, not in the application, but it makes errors on unloading...

Do I have to use the Cairngorm Module Library? I checked on Parsley documentation and they say that we can use flex modules and ModuleLoader. I tried to destroy manually the context but it doesn't change anything.