I've always thought that increased caster level (ex. by spell specialization or a magical items like blazing robe) increased the effective number of scaling spells' damage dice, too.
Fireball's description: "deals 1d6 points of fire damage per caster level (maximum 10d6)". If I'm level 8 with spell specialization on fireball, how many dices should I roll, 8 or 10? I'm not sure if caster level affects rolled dices, too.
Some PFS GM told me that the CL increase applies only for extra effects modifiers (like extra rays every n levels for some ray spells, for example), while others told me that the extra rolls are OK.
I might be missing something obvious, but I couldn't find any official source on this dilemma.