I'm encountering a playback problem I've not seen before. In the last few weeks while playing a song in Sonar (new version) I can't stop the playback. My mouse, keyboard have no affect on stopping it or allowing me to tap on anything at all. I have to use Control Alt Delete to stop and get out of it. And one odd thing is the window I'm viewing shows the song playing in a loop (it stays in one particular area like between the same chorus and a verse over and over) but the music continues to play until the end of the song then it stops or sometimes restarts.