I was attempting to patch after upgrading from 3.17.3 to this version, but after transferring KoboRoot.tgz, the system does the 'upgrading' and 'restarting' screens, and then starts rebooting, with the moving squares.... and never actually starts up. Or at least, after 5 minutes I gave up
After performing a factory reset, I tried updating directly to 4.2.8432, same thing. Disabled all of the patches, verified the libraries in KoboRoot.tgz hadn't changed using diff, still the same behavior. I eventually reverted back to 3.17.3, and re-patched without issue.
Any bright ideas, or things I can try?