Compact Flash from SanDisk, AA0203MS

Hello everyone. We have been using 32MB CF from SanDisk for more than a year
in our PC104/QNX6.1 system without problems.
But now suddenly the last ‘batch’ we bought just will not work. The number
on those CFs are “AA0203MS, CHINA” and can be found on the side of the
If we try with an older CF device everything works just fine. Has anyone
experienced this? Can it be that the whole AA0203MS batch from SanDisk
is faulty somehow?

Regards, Mats P