Contesting and making several key ups per minute (around 15 per minute) for at least 15 minutes would be the best way to tell. Im also using the latest firmware 1.07b. My amp was purchased 3 months ago.
I have just had my amp since Friday. I have used it quite a bit. I have yet had is go to swr bypass. Maybe im just lucky. It has firmware version 1.07b? Wonder if they made changes.