Incorporeal Questions

[Dragon78]

I know ghost touch weapons can crit incorporeal creatures but does it allow precision damage as well?

Can force effects crit incorporeal creatures?

Does positive/negative energy have full effect on incorporeal creatures?

[Kayerloth]

1) My view would be if you can crit you should be vulnerable to precision damage as well.
2) Yes if it meets all the other requirements.
3) Yes they effect incorporeal creatures normally per Universal Monster Rules and the CRB Glossary for Incorporeal condition.

This is however where one of the changes from 3.5 to PF jump out at me. Undead, probably the most common form of incorporeal creatures characters run into, were immune to critical hits in 3.5. No such language exists in the PF bestiary entry for Undead.