Not all eyes that notice bugs in Open Source code belong to saints who will report or repair them in the interest of the public good.
One of the things I've been trying to do is look for simpler or rules underpinning good or bad design. I think one of the most valuable rules is avoid duplication. 'Once and only once' is the Extreme Programming phrase.
When you feel the need to write a comment, first try to refactor the code so that any comment becomes superflous.
Any fool can write code that a computer can understand. Good programmers write code that humans can understand.