I just bought a Pentax K100D Super, and I have noticed a green speck that appears in nearly every shot at the same location. It's too bright and fine to be dust. I read that this is common at longer exposures, but I'm noticing this problem off and on, even at exposures of 1/4000 second and at as low as ISO 200 (both, I have read, are at the extreme opposite end of when hot pixels are likely to show). Does this mean I have a bad sensor? I tried viewing some RAW files in Camera Raw 4.2 (Photoshop CS3), but it features a real-time hot pixel remover, so the green speck is gone a split second after I open the RAW file. Since I can see it in RAW (at least for a second), I'm fairly certain this isn't just JPEG compression causing it. I'm sort of confused as to what to do. Should I return the camera to NewEgg for a replacement (I think they offer a limited 30-day same-item-exchange policy on cameras)? Or send it in to Pentax for warranty repair? Or is this something so common that I shouldn't worry?