It was in the above link, and I think the localised heating was the suggested reason for the pioneer anomalies. This QI if true would explain the EM drive (which is still under considerable study by DARPA) it would also do away with dark matter explanation of outer galaxy rotation which in turn would mean we don't have to search forever for another particle that might not exist.

Which is really the whole point, an alternative theory has been suggested, the only way to test it is with a space test but everyone looks at this experiment and says oh another EM drive, it's not it's an experiment, the possible results could open up genuine new science and all everyone thinks it's a scam or something are chomping at the bit to say 'eternal motion device' or fringe theory, ok it is a bit fringe, but we accept hawking radiation, it may be we have to accept quantised inertia, there could be an absolute smallest amount of inertia (it's super tiny)