Venturi: Yes the card that I didn't bring with me on Sunday also brings up a "memory card error" as soon as I turn the camera on.
Tried formatting all the cards on the camera, won't do it because of "errors" it states.
So I formatted all of them on my computer, and tried the 4g Extreme on my camera again. Still, "memory card error". And being that I didn't take one of them with me that day I can't believe they are all corrupt. I've had all of these cards for about a year and a half with no problems ever.
As far as the images off the 4gb, I was able to pull them up in PS on my computer but the very last file (when the error happened) was unopenable which made sense.
All I did was hit the review button too quickly (i'm spoiled by these Sandisk Extreme cards' speeds) when it was not completely done writing. I guess its all my fault and you can mess the card reader up by doing that huh?
As far as the locks, they are all where they should be. Besides, doesn't the camera say "card locked" when you do lock them?
I'm upset, I guess I'll call Pentax or something. But it feels futile.. I was hoping it was something stupid/easy that I could fix. Now its going to be super costly