I was doing some long exposures downtown last night. 30 second kind of stuff. Self-timer, mirror lockup selected. Today I want to take some snapshots of the grandkids. But the darn camera seems to be stuck in some weird mode. No matter how I set the programming mode (Green Box, P, Av, Tv, M) or however I set the shutter speed or aperture, it wants to take a 30-second exposure after which it does not display an image and none has been saved to the card. For example: M mode, 1/30th sec, f2.8, single-shot drive mode. Press shutter button, shutter opens and stays open for 30 seconds, closes, no image shown on screen or recorded to card. I've removed and reinstalled the battery and am running out of ideas how to get this thing to act normally.