I have determined when running MMV as a DXi inside of Sonar 2.2 on a dual monitor configuration (running in 2048x768 mode - i.e. 2 1024x768 monitor instances) and the MMV window falls on the right hand monitor, mouse movements over the 1025th pixel or greater tend to distort an destablize the audio engine in Sonar.
I have no problem when running stand-alone.
My work-around is to move the MMV window over to the left-side monitor which is not preferred.
Any suggestions?