Another possibly stupid question: I fooled around with settings to put the main shutter release in snap mode, and the AFL button into AFL mode. And now the snap function has basically evaporated. The shutter button isn't in snap mode. If I set the function button to toggle between snap and AF, it just doesn't. If I set snap in the menu -- nada. It just stays on AF. The only thing that does seem to work now is full-press snap (if I set it in the menu). Did I set something weird that I have to unset? Is the camera going haywire? I suppose if that's the issue, I should try a full hard reset, to clear everything?