After looking at Bug 151533: fsck tries to read directories as block devices
with some bind mount setups, Ted said that since a malformed bind mount line in
fstab was the root of the problem, perhaps the bind mount format should be
documented in the fstab or mount man pages. Thoughts?

to me,

/orig   /mountpoint    none   bind   0 0

makes most sense...

(as a side point, for bind mounts, mount doesn't seem to care at all what's in
the filesystem field.... should it?  should it enforce "none?")

Thanks,

-Eric