I'm experiencing crackling/static noises from the center channel on my Onkyo 797 during Gladiator (first battle when they fight the African legion) and Planet of the Apes (usually during loud monkey screams). DTS track on both. Anyone else ever hear it? Is this the normal crackling problem inherent to certain DVD soundtracks, or is my receiver just not up to the task? It was so bad during POTA that I thought my tweeter might blow.