An example of quick patch is that the latest Chrome version spoofed Safari's user-agent to make Hotmail work properly. "Normally you think of web pages being faster to update than client-side software downloads. In this case though, Chrome updates near-weekly, much faster than Hotmail did. Another illustration that velocity and speed of iteration matter," commented Google's anti-spam guy. And probably another example that web developers ignore browsers with small market share.
Update: Check out the behind the scenes photos.