Actually According to apple [i]it patches 22 holes not 31[/i] and one only affects Mac OS X server and 3 are only for Mac OS X 10.3.9 which is a old release (Current is 10.4.x)
So if you are running the Current Mac OS X Tiger Client version It only patches 18 http://docs.info.apple.com/article.html?artnum=304829
EDIT: Added link to Apple Knowledge base article as proof