There are a couple of other topics that talk about this issue.
The upcoming firmware (released at the end of last month… not) should have a “fix” for this problem. Though since it is hard to duplicate this problem and the exact cause is unknown, it’s hard to say if the fix that SanDisk came up with will actually correct it.
When the firmware is released, which should be anytime now, I guess we will see if this was fixed.
