In the Pathfinder rules (which are really a kind of D&D 3.6 or 3.7)
the rules for wizard specialization are changed. Specialists still
get a bonus spell per level, but they aren`t entirely barred from
their opposition school(s). Rather, memorizing a spell from their
opposition school requires two spell slots rather than one, "paying"
for the bonus spell. There are a few other ancillary benefits of
specialization along with related penalties, but those don`t really
concern us overly for BR purposes.

In BR, of course, we have magicians who are usually portrayed as
"specialist" illusionists and/or diviners in 3e+ terms. They got a
few additional benefits in 2e, though, given the fact that opposition
schools were everything but illusions, divinations and, I guess,
universal spells.

So, two questions:

1. For blooded wizards, would you use the Pathfinder version of
specialization in a BR campaign, or require an older 3e interpretation?

2. Given that specialization is a bit more relaxed in Pathfinder, do
you think Magicians should be given additional capabilities if using
the Pathfinder version of specialization?

Gary