I bought my D300 a few months ago during a local campaign and I've been more than happy with it so far but the other day I realized the flash wasn't firing. I was going to take a couple of pictures of my cousin and his newborn daughter so I pushed the open button on the side of the camera, focused and pressed the trigger. The shutter snapped as it should but no flash even though the lightmeter said something like 1/60 f/5.6. Yesterday I tried the same, opened the flash and activated the light meter, only to realize that I had forgotten to remove the lens cap from the lens. I removed it and pressed the trigger and voilà, a flash. I pressed it again and once again, a flash. When I turned the camera off and on again, it wouldn't fire the flash anymore. I've tried both my lenses (35/2, 16-85), all modes (PASM/rear/red-eye/etc) and many different light conditions but to no luck, the flash icon in the finder won't light up. I've previously used a borrowed SB-600 with very good results so I'm a bit confused. If I hadn't gotten those two flashes yesterday, I would have taken it back to my dealer but now I'm unsure; is it me or the camera? Is there anyone who can help me cast some light on this? (pun intended) Even though I plan on buying my own SB flash, the pop-up one is quite handy at times and I'd like to know that it works as it should before going away on a trip in a couple of weeks.