seems TVNZ have decided to remove some functionality in the latest update. I used to be able to start watching One News after it had started and rewind to the start (if accessed vis the program menu as opposed to live TV). Now you can only watch live or wait for the recording to show up after 7pm which isn't in HD.
I can't see why they need to remove this so I'm hoping its just a bug. Have sent them an email so will see what comes back. This is pretty much the only thing I use the app for but if I can't rewind to the start when its being broadcast I'll need to use the built in recording function in my TV - no more "one box" solution.