Clearly today is SDHC firmware update day, Pentax has also introduced new firmware for the *ist DS (ver 2.02), *ist DL (ver 1.03), *ist DS2 (ver 1.02), *ist DL (ver 1.02), K100D (ver 1.02) and K110D (ver 1.02).All of these updates simply "improve SDHC support" over previous versions. Currently the new firmware is only available on the Pentax Japan website, we would recommend waiting until the firmware becomes available in your region before attempting to update.
Click here for the Pentax Digital English support page Via dpreview.com