When you have a drop out do you pretty much just have to close it and restart the program? It tells me there's a dropout and then freezes. I'm assuming that you just have to ctrl-alt-dlt it and close the program, right?
It's not too big of a deal. I've only had two drop outs ever. But yeah, if it shouldn't be freezing completely then it could be a problem. I have the latest 1010 drivers. I haven't tried the shutting off the audio engine thing.
There's no need to shut off the audio engine. It shuts off when you have a drop-out. What Brzilian meant was when that happens you should just need to start it again.
I would try what Qwerty suggested. Delete the Sonar aud.ini file. When Sonar starts again it will reprofile your sound card and write a new aud.ini file.
You will lose any customization you have done in Sonar, and will have to reset everything (default directories, etc.).
You say it's only happened twice. Over what time period? If you are talking about twice in a year or so, I would probably just forget it. Just remember to save your work often.