I think I know what to do to fix FS#9642 (Bootloader USB Diskmode fails to exit gracefully on CFModded H100) -- a simple addition of one line of code. I've posted the diff in the comments for the bug. I don't know how to test it, though, without risking bricking my player. What can I do to avoid risking my precious hardware when testing a change to the bootloader? Or can anyone assure me that the change in question isn't going to do anything bad?
-David