I see a possible issue for familiar attack bonuses. The PRD says:
Adding Weapon Finesse gets the attack bonus to show correctly, but means the familiar then has a validation error for too many feats.
My witch PC has a thrush familiar, with Str 1 & Dex 15. Its attack bonus with its beak attack should be +6 (+0 BAB, +4 size, +2 Dex) but instead is calculated as -1 (+0 BAB, +4 size, -5 Str).PRD said:Attacks: Use the master's base attack bonus, as calculated from all his classes. Use the familiar's Dexterity or Strength modifier, whichever is greater, to calculate the familiar's melee attack bonus with natural weapons.
Adding Weapon Finesse gets the attack bonus to show correctly, but means the familiar then has a validation error for too many feats.