Quoting explorer@flame.org,

> Has anyone else noticed things like this?  This is the output of ls -ltr
> on my NetBSD 1.2G machine mounting a NetBSD 1.2E disk.  I also see the
> same problem when mounting a Solaris disk from a 1.2x machine.

[duplicate file entries]

I assume that directory just had some activity in it, i.e. files
got added/removed? This is a known bug.

It will be fixed when I get around do rewriting the NFS cookie
handling (see my proposal to tech-kern from a while back).

- Frank