Originally Posted by Narsil
Yes, I actually do remember one of the books dealing with this, saying that you can't use forbidden-school spells, even if one of the other schools it has happens to be your specialist school. Though I suppose a duallist could use such spells.
Thanks! Any idea which book it was or where else to look? I've looked through the PHB, Tome of Magic, Wizard's Handbook, and Complete Book of Necromancers to no avail.