[jrockway]

It's true. But you have to keep in mind, nobody wants $2.56 from Knuth. The value comes from the fact that one of the most famous and respected computer scientists to ever live has sent you a thank you note for fixing an error that he made in his book.

[tjr]

I once sent him an alleged error report in which I was mistaken. He cordially wrote back and explained why I was wrong. So I sent him a check for $2.56, and he cashed it...