I bought a PNY Optima SDHC 8 GB card from Best Buy on sale about 3 months ago. This past month, there has been about 1 or 2 corrupted images when I transfer the photos to iPhoto, and they won't transfer. And when I look into the memory card folder on my desktop, the corrupted photo will appear with part of it grayed out or it will be combined with part of an image I had took and deleted a few weeks ago. My camera is a D5000 and about the same age as my memory card, and the card nor the camera appear to be broken where the memory card goes into the camera. Is there something I could do to fix this, or do I have to purchase another memory card? Thank you for the help.