One day, out of the clear blue sky, Word's Find function starting finding incorrect words, like "leave" when I asked for "live," and "tool" for "tell." What's going on?
The Fix: It sounds like you accidentally activated the "Sounds Like (English)" feature, which tells Word to find similar-sounding, but differently spelled words. To fix the problem, select Edit-->Find, or press Ctrl-F to open Find, click the More button, and uncheck the "Sounds Like (English)" checkbox.