Hi, 
I commented in common.js (root/webim/js/souruce) that code:
function playSound(wav_file) {
//   var player = document.createElement("div");
//   var agt = navigator.userAgent.toLowerCase();
//  if(agt.indexOf('opera') != -1) {
//     player.style = "position: absolute; left: 0px; top: -200px;";
//  }
//  document.body.appendChild(player);
//  player.innerHTML = '<embed src="'+wav_file+'" hidden="true" autostart="false" loop="false">';
}
but the chat still plays sounds, and on chrome the chat window is solid blue after consultant connect. What's wrong?