It looks like my replaced video card wasn’t a fluke – Apple is now voluntarily replacing the cards if they match a specific serial number range. The real question comes in two parts – a number of people who had their cards replaced when I was reading about this issue over a year ago got cards of the same vintage back. So, part 1) Did I get a new, unaffected card? 2) If I got a second defective card, can I get a third?

It’s probably also time to pull the system apart and blow it out for dust and the like. I do wish Apple would include vent/fan/airflow filters as part of the professional lineup. Would be a nice gesture to people who spend the big bucks and buy the high end.