Bug#683573: libsasl2-2:i386: Conflict with amd64 package (changelog.Debian.gz)

[Marcelo Juchem]

Package: libsasl2-2
Version: 2.1.25.dfsg1-4+b1
Severity: serious
Justification: Policy 7.6.1

I have Debian Unstable amd64 running on my system.
After adding multiarch support:
- `dpkg --add-architecture i386`
- `sudo aptitude update`
- `sudo aptitude`
- upgrading ia32-libs and ia32-libs-gtk
- performing installation
The package libsasl2-2:i386 was added as a dependency of ia32-libs
During installation it tried to overwrite a file, changelog.Debian.gz in
/usr/share/doc/libsasl2-2/ (which I believe belongs to its amd64 counterpart).
This is the output error:

-- BEGIN Output from aptitude --
Errors were encountered while processing:
 libldap-2.4-2:i386
 libcurl3:i386
Press Return to continue.

Reading changelogs... Done
Extracting templates from packages: 100%
Preconfiguring packages ...
(Reading database ... 403807 files and directories currently installed.)
Unpacking libsasl2-2:i386 (from .../libsasl2-2_2.1.25.dfsg1-4+b1_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/libsasl2-2_2.1.25.dfsg1-4+b1_i386.deb (--unpack):
 trying to overwrite shared '/usr/share/doc/libsasl2-2/changelog.Debian.gz', which is different from other instances of package libsasl2-2:i386
Errors were encountered while processing:
 /var/cache/apt/archives/libsasl2-2_2.1.25.dfsg1-4+b1_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
dpkg: dependency problems prevent configuration of libldap-2.4-2:i386:
 libldap-2.4-2:i386 depends on libsasl2-2 (>= 2.1.24); however:
  Package libsasl2-2:i386 is not installed.

dpkg: error processing libldap-2.4-2:i386 (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libcurl3:i386:
 libcurl3:i386 depends on libldap-2.4-2 (>= 2.4.7); however:
  Package libldap-2.4-2:i386 is not configured yet.

dpkg: error processing libcurl3:i386 (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 libldap-2.4-2:i386
 libcurl3:i386
Press Return to continue.
-- END Output from aptitude --

-- System Information:
Debian Release: wheezy/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.4-trunk-rt-amd64 (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages libsasl2-2 depends on:
ii  libc6              2.13-35
ii  libdb5.1           5.1.29-5
ii  multiarch-support  2.13-35

Versions of packages libsasl2-2 recommends:
ii  libsasl2-modules  2.1.25.dfsg1-4+b1

libsasl2-2 suggests no packages.

-- no debconf information