[Milhouse]

Edit: I see, that fsck on boot was introduced in #0607 - is there a way for me to manually add this single feature right now, or should I just try to do the update from my PC, to the latest build?

If you want to debug the boot process then add "debug break=all" to the end of your line in cmdline.txt and use a keyboard connected to the Pi to work through the boot steps until /storage is mounted to see what shape it's in.

Or you can add "textmode" to your line in cmdline.txt and that will give you a text console in OpenELEC where you can investigate /storage.

Alternatively, fsck the USB drive in a PC running Linux, or the Pi while running Raspbian.

Falling all of that then yes, manually update your SD card with the latest build.