In reply to:
Have you tried setting the info mode through the menu, or via the remote control?
Probably both - and also by toggling using the Down button.
I've just had a play here in the office - it does remember correctly whether or not it was on a full-screen info if it was selected by menu, but not if it was subsequently changed by the remote or by toggling before power-down. And of course, in the car, I'm likely to start up, toggle the info off, then do nothing till power-down if it's a short journey.
I'll have more of a play (in the car) and see what happens.
Thanks for the workaround.