Bastard sword's description has the stuff about EWM all messed up. The Uncanny Blow allows you to

a) Get 2*Str instead of 1.5*Str to damage when using a one-handed exotic weapon with two hands or

b) Get 2:1 PA returns when using a one-handed exotic weapon with one hand.


Also, since bastard sword/dwarven waraxe/dragonsplit mention EWM, there should be a note on Revenant Blade in Valenar Double Scimitar's description, too.