I just remembered another one...I was writing a trivia grading script, and in the data file where I kept the questions and correct answers, without realizing what I was doing, I used \0 as the delimiter. then I couldnt figure out why the data file wouldnt write like it was supposed to. (if that makes sense to anyone other than myself)

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When I get a little money, I buy books. If I have any left over, I buy food and clothes.
-Erasmus