If you have configured multiarch on your 64-bit system, this is not the moment to d-u:
root@imerabox:/home/don# apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
The following packages will be REMOVED:
libasound2:i386 libaudio2:i386 libc6:i386 libc6-i686:i386 libcomerr2:i386 libdbus-1-3:i386 libdrm-intel1:i386
libdrm-nouveau1a:i386 libdrm-radeon1:i386 libdrm2:i386 libexpat1:i386 libffi5:i386 libfontconfig1:i386 libfreetype6:i386
libgcc1:i386 libgcrypt11:i386 libgl1-mesa-dri:i386 libgl1-mesa-glx:i386 libgl1-nvidia-glx:i386 libglapi-mesa:i386
libglib2.0-0:i386 libglu1-mesa:i386 libgnutls26:i386 libgpg-error0:i386 libgpm2:i386 libgsm1:i386 libice6:i386 libjbig0:i386
libjpeg8:i386 liblcms1:i386 libltdl7:i386 liblzma5:i386 libmng1:i386 libmpg123-0:i386 libncurses5:i386 libodbc1:i386
libp11-kit0:i386 libpciaccess0:i386 libpcre3:i386 libpng12-0:i386 libqt4-dbus:i386 libqt4-network:i386 libqt4-xml:i386
libqtcore4:i386 libqtgui4:i386 libselinux1:i386 libsm6:i386 libssl1.0.0:i386 libstdc++6:i386 libtasn1-3:i386 libtiff4:i386
libtinfo5:i386 libuuid1:i386 libv4l-0:i386 libv4lconvert0:i386 libwine:i386 libwine-alsa:i386 libwine-bin:i386 libwine-gl:i386
libx11-6:i386 libx11-xcb1:i386 libxau6:i386 libxcb-glx0:i386 libxcb1:i386 libxcomposite1:i386 libxcursor1:i386 libxdamage1:i386
libxdmcp6:i386 libxext6:i386 libxfixes3:i386 libxi6:i386 libxinerama1:i386 libxml2:i386 libxrandr2:i386 libxrender1:i386
libxslt1.1:i386 libxss1:i386 libxt6:i386 libxv1:i386 libxxf86vm1:i386 skype:i386 teamviewer7:i386 wine wine-bin:i386
zlib1g:i386
The following NEW packages will be installed:
wine64-bin
The following packages will be upgraded:
exim4 exim4-base exim4-config exim4-daemon-light libc-bin libc-dev-bin libc6 libc6-dev libc6-i386 libmozjs10d libpcsclite1
libsasl2-2 libsasl2-modules libxnvctrl0 linux-headers-3.6-3.towo-siduction-amd64 linux-headers-siduction-amd64
linux-image-3.6-3.towo-siduction-amd64 linux-image-siduction-amd64 locales multiarch-support nvidia-settings
21 upgraded, 1 newly installed, 85 to remove and 0 not upgraded.
Need to get 51.4 MB of archives.
After this operation, 415 MB disk space will be freed.
Do you want to continue [Y/n]?
I am not the expert to say what is happening with all the i386 packages -- just giving the warning to be careful.