eh guys, i also have plenty problems with SOLUTIONS CF cards. Have tried both the 128MB and the 256MB cards, both give me problems.
And not just on DC, but on 3 different DCs. Tried them on Casio, on Canon, on Fuji Finepix. I think as with all storage devices, some of them may have bad sectors.
So i recommend if you want to spread your risks, consider getting smaller cards (cost more) instead of getting one piece of 1Gb card. Unless you are shooting in raw format, then a few pieces of 128 MB or 256MB will be a safer alternative.