Bill, Google picks up common errors and similar words because it has been programed to do so. Common misspellings are listed, as are common keyboard induced typos (teh). As are notable names and common misspellings thereof. Google might catch a misspelling of "Umar Farouk Abdulmutallab" today, but I bet it would not have before the jerk became famous. There is the old 'programmer's curse: "Why won't this #&@!$ computer do what I want it to instead of what I tell it to do"?
Brazilian head of UN peacekeeping force in Haiti dies of heart attack (Reuters)
from the article: Israeli firm blasted for letting would-be plane bomber slip through