I think stabilization is on all the time in video mode, not in photo mode. And it consumes a lot of power, especially in mine EF 28-300 IS USM, that has made me rather disciplined, to turn of camera when not needed, but ML being somewhat unstable thus messes with it, because sometimes after turning it of it does not want to start unless you do battery reset, which in my case is easy because of battery grip, but anyway. In high pressure time i still would use ML free camera, just to be on safe side, 7D is still an early adoption, and does behave strangely, yet I report only those issues I can repeat / prove, like the one with battery percentage sticking at 100%.