Picked up a SanDisk 4GB microSDHC package to upgrade the storage capacity of my Pentax K100D. The package because contains a 4GB microSD, an SD adapter, and a USB SD reader so I figured it’s a good deal. As soon as I got home I excitedly plugged the microSD into the adapter and the adapter into the camera. Memory card error. WTH? I removed the adapter, plugged it into the reader, and plugged that into the PC. Works fine. I did a search and discovered that, as I suspected, the camera does not support SDHC! Fortunately, there is a version 1.02 firmware update that provides support for SDHC. I promptly downloaded and started the update. After a few tense minutes (there is always that risk of turning your beloved electronic gadget into a brick) the update completed. I restarted the camera and lo and behold: 1386 photos at highest resolution and best quality!