A new bug found in iPhone OS 3.0 has led some users to take pictures that were rendered invisible on the device. According to a lengthy Apple Discussions thread, the bug appears to pertain only to photos with the name IMG_10000 or higher, as the built-in Photos application refuses to acknoledge their presence or show them in the Camera Roll. Users are reporting, however, that the pictures are indeed still on the device, and can still be imported to…