So I had ubiboot running for a while, an older version that I installed in July.
I tried to update ubiboot to the latest version using the installation instructions here (basically flashing ubiboot kernel, copying over cpio etc and extracting preinits.tar. Now whenever I try to boot, no matter what I select (or even if I select nothing), I get the same issue as Garp: I can still access the filesystem if I connect to USB. Any ideas? Also, where is the log file stored?