Any changes in Manager Interface Events?

I tried to interpret AMI Events, but in Asterisk1.4.x, I found two changes follows,

  1. Event ‘MusicOnHold’ isn’t generated at all. (It was generated normally in 1.2.x)
  2. When the original caller(like customer) hangs up the call, ACD ring call for Agent(with Queue Application) still ringing. (In 1.2.x, ACD call was hung up simultaneously.)

Is there any change specifications on AMI Events in 1.4.x?