k, i have a nikon d40. i've been having it for a month now. until friday, i had no problems with it whatsoever. for some reason, my 2gb sd card got corrupted, and i needed a card bad friday to shoot this night club. i needed a quick solution, so i grabbed my 1gb micro sd from my cell phone and used it along with the sd adapter. everything worked out fine. so tonight, i went out to shoot another club with he same card. i took maybe 100 shots and looked back through the pictures. everything was cool. i did however accidentally leave the camera on the 'on' switch for a few hours, but i know it goes to sleep mode after awhile. so i'm just getting home and when i go to put the card in my computer to extract the photos, NONE of the pictures were there. the last image on the card was the last shot i took on friday. WTF?! what could have possibly caused this? i'm so fucking pissed/stressed at this situation because the photos i took tonight were EXTREMELY important for business matters.