Major changes to webserver backend. All socket functions are abstracted to allow support for stream_* which seems to be both more widely supported and better at handling blocking and timeouts, at the cost of a small bit of speed. Keep-Alive times out properly and thanks to a bit of IPC code from stream_create_pair(), zombie children are mostly eliminated by proper pcntl_wait() being called when a child shuts down normally, and children die within 0.2sec if the parent receives a SIGTERM or SIGINT, even if the children are waiting on the socket.

function getScrollOffset()
{
  var position;
  if (self.pageYOffset)
  {
    position = self.pageYOffset;
  }
  else if (document.documentElement && document.documentElement.scrollTop)
  {
    position = document.documentElement.scrollTop;
  }
  else if (document.body)
  {
    position = document.body.scrollTop;
  }
  return position;
}

var fix_scroll = function()
{
  var div = document.getElementById('playbar');
  div.style.top = ( String(getScrollOffset()) ) + 'px';
}

window.onscroll = fix_scroll;