Must have been a problem with the update. Deleted the app and reinstalled and its now fixed.
Since the update the other day I am finding that if I write something in penultimate (ipad) then switch to another app, then switch back to penultimate, my text will be there for a second and then vanish. If I hit undo then the app crashes. So basically the app is completely useless. Is anyone else having this problem? Extra information: Ipad 4, latest version of iOS.