How does the player handle fsck of the / partition? If errors are found, does it reboot afterwards to ensure consistency?

The player never fscks the / partition. As far as a completely-stock Empeg is concerned, the root partition is only ever written to by writing an entire disk image over it at upgrade time. "Adventurous" users who write to it at other times and by other means are assumed to be clueful enough to bear the fsck responsibility themselves.

Peter