Hi @simonster
Yes, I'm using select + start to return to EmulationStation then shutting down cleanly before switching the power off.
If I save my progress in-game and then go back to the game's start menu (without stopping the emulator, just the game/level) then the "memory card" is blank and I can't load what I just saved.
Is there any way of digging deeper to find out what's going on?