I tried to paste these code at the end of TestController::TestController() constructor, (cocos2d-x/tests/tests/controller.cpp)
or at the start of ActionsDemo::onEnter (ActionTest.cpp)

#if 1
    CCLabelTTF* label2 = new CCLabelTTF();
    if ( label2 && label2->initWithString("aaaaa", "Arial", 32) )
    {
        label2->autorelease();
    }
    else 
    {
        CCX_SAFE_DELETE(label2);
        label2 = NULL;

    }
#else
    CCLabelTTF* label2 = CCLabelTTF::labelWithString("aaaa", "Arial", 32);
#endif  
    if (label2)
    {   
        label2->setPosition( ccp(10, 10) );
        addChild(label2);
    }

It crashed at android, if I new CCLabelTTF object, and call object->initWithString. The odd thing is that, CCLabelTTF::labelWithString works well.
The crashed code works well on win32 & iphone port.