See, what they're talking about is when a programmer across the globe checks in some chunk of code that breaks things, that makes the game unplayable. And, yeah, we've had people check in code that broke stuff, but generally, when someone breaks the game, we fix it. If it's not our code we pass it off to whoever we can, but if nobody's around who knows the code, it's time to just buckle down, figure out what's wrong, and make it right.
And generally, this isn't hard. We can use sourcesafe to figure out what changes were made and either reverse them temporarily or figure out what went wrong in them to break things. In fact . . . it's never been hard. Sure, sometimes we waste a few hours, but it's usually not so bad . . . so what's the problem?
Maybe everyone at Snowblind just rocks. :P