SD card suddenly read-only

[Dotan Cohen]

I have been moving files back and forth between an PDA (Dell Axim) and
my personal computer (the Kubuntu machine) via SD card all day.
Suddenly, the Kubuntu machine insists that the card is read-only and
will not write to it. Even reseting the machine and switching card
readers does not help. The Axim still writes to the card just fine.
What could be the cause?

Thanks in advance.

-- 
Dotan Cohen

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