What is the least impact way of updating the firmware (kernel in the case of 38-2, I believe) when using an MMC root file system? I suspect that things would break badly if I did another blind tar copyfrom the on-board flash to the MMC, as I have updated many apps since the initial copy.

Or is any updating required for the latest fix? Maybe the kernel image is still on the on-board flash, so thing will work magically?

Is there a way to only update the kernel image, perhaps?

Thanks in advance for assistance.