With the work on trying to make the sansa boot the OF from the original partition, it was noticed that it started failing CRC checks.
After a little testing with some code JDGordon wrote, I've found that the OF can become unbootable, and there's an apparent pattern to the corruption. I've used a simple hex comparison program to output the differences between the original bootpartition (that was working) and the one that doesn't work. There seems to be a pattern to both the values and the addresses. First it only changed the first five of those addresses, to those values, and continued being able to boot the OF. Soon after the CRC changed again, and I dumped an image with all of those addresses changed, and it fails to boot at all (simply resetting the sansa and rerunning the Rockbox bootloader).
