Re: flyspell bug

[Richard M. Stallman]

    No, I think this is the intended behavior. Flyspell is not spell-checking
    the whole buffer for you, only the words that you enter, edit, or are about
    to edit (i.e. that the cursor is on). It is not like in MS WORD where all
    misspelled words are marked. See the Emacs manual:

That is true of Flyspell mode; but he used flyspell-buffer,
which does check the whole buffer.

I think the explanation is that "defun" is not considered a misspelling.