I'm curious, what was the bug that was so critical the publisher decided it was best to perform such a (what I assume was) costly operation post-distribution?
The issue was that one programmer used an unauthorized system call to make the disc drive spin twice as fast, as they thought it was a great way to resolve some of the data streaming issues the game had. And yeah it worked - but after few hours of playing it would kill the GameCube. It wasn't really noticed because no one tests the game on actual discs right until actual gold master is made(usually), and then when the devkits died it was considered a random hardware fault and Nintendo just replaced them.
But yes, my understanding is it was quite expensive and the publisher was none too pleased (: