Great post. Some general takeaways for people who want Knuth checks:<p>1. You are unlikely to find errors in the algorithms themselves, especially if they've been officially published. You might find some infelicities, but these are not counted as full errors. For example, the author here found some confusing-but-not-wrong comments about local variables and unused registers. These are counted as "suggestions" (worth 0x20¢) rather than "errors" (worth 0x$1.00).<p>2. Knuth is pretty generous with credit -- if your suggestion leads him to find an error, you get credit for the error. The author here said that some defined variables went unused. Knuth pointed out that those variables were in fact used in an exercise. However, in looking this up he noticed a variable-related error in that exercise. Author is credited with 0x$1.00!<p>3. Exercises are more likely to contain errors and infelicities than the main text. And there are an awful lot of exercises.<p>4. Knuth includes a whole bunch of stuff in his books that is not related to CS. Lots of weird trivia and references. This stuff is more likely to be wrong than the main text. For example, Knuth mentions "icosahedral objects inscribed with Greek letters" and includes a reference to an article in the <i>Bulletin de l’Institut français du Caire</i>. But the author points out that the article is actually in the <i>Bulletin de l’Institut français d’archéologie orientale</i>. Whoops! 0x$1.00 for you!