Transcend 16GB SDHC causing erratic K-7 behavior???!!!

Hi,

Recently my K-7 has been misbehaving. When I turn it on, it'll stay at the mode screen till I press the shutter button. Then when it is in shooting mode it behaves very erratic. Sometimes it freezes. Rarely does it respond correctly and take a picture.

Re-flashing the firmware did not change anything.

Currently the power switch is OFF but the top panel display is still on. So I have to remove the battery.

After I removed a Transcend 16GB SDHC class 6 card my K-7 works fine. With another card in it (Sandisk Ducati) it works fine.

Formatting the Transcend did not help.

Anyone experienced this kind of problem?

thanks,
Fred