Grrr. I changed the structure presented to userspace by the MEMGETINFO ioctl, which is a pain in the arse because I can't currently compile user-space binaries for by test board.
They'll call me back, apparently. I bet that if they ever do, they've not managed to fix the problem, and probably not even managed to understand it either.
They didn't, they hadn't, and when I eventually called them back, they hadn't.
Fucking Useless Telco.