What attribute do incorporeal creatures use for strength skills?

Question

The SRD clearly states that incorporeal creatures have no Strength score, and use their Dexterity modifier for both melee and ranged attacks. However, what about Strength-based skills? Can a spook even use skills like Jump? Do they get a bonus from Strength (+0) or does Dexterity replace it?

Answer 1

From the SRD:

The modifier for a nonability is +0.

The incorporeal subtype makes no mention of exceptions for strength-based skills, so in the absence of any text to the contrary (such as exists for melee attacks), you simply use your strength modifier (+0) for any strength-based skill checks you make.