Maybe I am thick, but I find a couple ambiguities in the Arcane Schools section on p. 194 which can be problematic:
"In addition to these abilities, each school also grants a
number of bonus spells. Whenever a wizard attains the listed
level, he can choose one spell from his school to prepare every
day as a bonus spell. Instead of gaining a spell of the listed
level, the wizard can instead choose a spell of a lower level,
which he can then prepare twice per day (except for 2nd level).
A universalist can choose spells from any school. Once chosen,
these spells cannot be changed."
Does this mean that Universalists only have to choose a spell of the level which then cannot be changed, whereas specialists may select a school spell from their spellbook at their convenience every time they prepare their daily spells; or that all wizards have to choose an unchangeable spell? The first option seems to make more sense to me, as it gives specialists a bit of leeway.
Second issue, "2nd Level: The wizard can cast any first level spell from his chosen school. This spell is prepared once per day for every
two caster levels he possesses."
Does "caster levels" here imply that other arcane level granting classes, like PrCs, stack with his Wizard level? How do those PrCs affect caster level for special abilities, such as granted at lvl 1?