dchroot with sid

[Owen Heisler <owenh000@gmail.com>]

I have a 32-bit sid chroot installed at /var/chroot/unstable-ia32 on my
amd64 Sarge system.

But I get this error with any command:

# dchroot -d -c unstable ls
(unstable) ls
/bin/ls: /bin/ls: cannot execute binary file
dchroot: Child exited non-zero.
dchroot: Operation failed.

I used the amd64 howto to do this, and started with a sarge
installation, then upgraded to etch, then sid.  At etch, I started
getting this error.

I have copied /etc/passwd, /etc/shadow, and /etc/group into the chroot.

I have modified /etc/fstab (on the "host" 64-bit) to
include /var/chroot/unstable-ia32/home, tmp, and proc.

Any suggestions?
Thanks.