Unable to permanently write to rootfs

"Mikko Heiskanen" <[email protected]>
Newsgroups gmane.os.netbsd.help
Message-ID <[email protected]> 
I'm all out of ideas about why my nbsd-301-i386 running on a
qcow-image in qemu 0.9.0 keeps telling me upon boot that the
root filesystem isn't marked as clean.
I drop to singleuser and mount ro, fsck, no errors, mount rw,
edit something in /etc, boot, and swoosh!
It's as if I've never edited anything in there.
I'd appreciate any ideas.
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