I think when rotating the shutter dial with the flash engaged, it STOPS at the max synch. speed.
Maybe. I don't have my camera to hand to check it. But if you set a fast shutter speed (in Tv or M mode) and then pop up the flash, it doesn't automatically change the shutter speed for you. And if you're using Av mode it doesn't know what shutter speed is required until you press the shutter button, so it can't prevent you setting an aperture that requires a fast shutter speed.
The more I think about it, the more I suspect xarqi is right.


Knew it was going to happen !
