Anyone else getting this, or got any ideas how to fix?

Everything was working last night. I could watch programs using the TVNZ app on my T2100.
Not tonight though.
I can watch the advert at the start but then the picture goes back to the program listing/summary screen although the sound continues. If I then quit the app I get a glimpse of the program. If I pass ok instead I get a glimpse of the program which then restarts with the initial advert.
I've tried turning it off and on again, unplugging it from the mains for a while, restarting the app, logging out and in again...

We got that video of the woman with her cat before this started happening.

I'm at a loss as to what to do now.