The Willing Stand-Ins
The pronoun is a useful little part of speech that resembles a
World War II minefield when it comes to error possibilities.
Geraldine Woods, English Grammar for Dummies
The use of male pronouns as the gender-neutral default is a dying
tradition, but that problem is easier said than solved.
Bill Walsh, The Elephants of Style
The battle between whose and who's comes up less frequently
than the one between its and it's, but the problems are identical.
If you can solve one, you've got the other one whipped.
Patricia O'Conner, Woe Is I
It, clearly a pronoun meant to refer to an idea previously
expressed, is often used by students to refer to an idea still in
Joyce Armstrong Carroll and Edward E. Wilson, Acts of Teaching
What should you say on the phone: [It is me?] or [It is I?]
Maybe you should just hang up the phone and send a fax.
Laurie E. Rozakis, The Complete Idiots Guide to Grammar and Style