Registered on this forum just to report this bug, because it frustated me enough.

I saved the "Tome of Release" (that lets you remove a negative trait) through half the game.  Finally used it on Lady Dindraine to remove her "Mission Conscious" negative trait.

I went and did one mission, and afterwards, the negative trait is back.  Is the "Tome of Release" supposed to be temporary?  I didn't think it was.