Hi, I am not a fan of the flash unit on the 40D and steer away from using it. The problem is that when I do need it for a quick snap, for some reason I find that it fires away profusely as the camera wants to focus. Now and then the 40D just refuses to take the shot, because the AF is not happy. You release the trigger and try again and hope for the best. In so doing you miss the moment and it is not captured.
Has anybody else noticed this behaviour?