Some Fun Mistakes in Code (Do Not Repeat Them ;D)

http://stackoverflow.com/questions/237241/what-coding-mistakes-are-a-telltale-giveaway-of-an-inexperienced-programmer

http://stackoverflow.com/questions/1556672/most-horrifying-line-of-code-you-have-ever-seen

http://drpaulcarter.com/cs/common-c-errors.php
http://c2.com/cgi/wiki?NonNullTerminatedString