Confirmed on Precise on an amd64 system with libclutter already installed
$ apt-get install libclutter-1.0-0:i386
[...]
Selecting previously unselected package libclutter-1.0-0:i386.
Unpacking libclutter-1.0-0:i386 (from .../libclutter-1.0-0_1.8.2-2_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/libclutter-1.0-0_1.8.2-2_i386.deb (--unpack):
'./usr/share/doc/libclutter-1.0-0/README.gz' is different from the same file on the system
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)
Confirmed on Precise on an amd64 system with libclutter already installed
$ apt-get install libclutter- 1.0-0:i386 1.0-0:i386. 1.0-0:i386 (from .../libclutter- 1.0-0_1. 8.2-2_i386. deb) ... apt/archives/ libclutter- 1.0-0_1. 8.2-2_i386. deb (--unpack): share/doc/ libclutter- 1.0-0/README. gz' is different from the same file on the system
[...]
Selecting previously unselected package libclutter-
Unpacking libclutter-
dpkg: error processing /var/cache/
'./usr/
dpkg-deb: error: subprocess paste was killed by signal (Broken pipe)