well i'm using 8gb Sandisk Class 4, it's more than enough. with class 6 just extra 1 frame if not mistaken I actually got another 1 because the free memory card always get stuck inside, after buying it, it turns out that the card has 2 sticker (rebranded toshiba)

care to clarify more on what error are you getting? Mine seems to be working fine and having no issue at all.

well try switching on without the memory card? How did this happen anyway? (remembered that you were using your dslr few pages back )

lol, well i just got internet back after a month of having no internet ...D3000 user also mah, never regret getting it ...Well could always send it to Nikon service center at time square to let them have a look.

change for free usually. Don't tell me your shutter having issue already o_O?

lol,but usually if one's shutter count reach that amount during warranty period, one can bullshit (shutter got issue or some other reason) and get it replace for free.