Comment 33 for bug 831768

Workaround:

After trying the previously mentioned workaround, things were still broken, complaining about qdbus. So I did:

# If you have disabled multiarch by modifying /etc/dpkg/dpkg.cfg.d/multiarch, you must re-enable it temporarily. The file should exist, and contain the line "foreign-architecture i386" (on my amd64 machine at least).
apt-get update
apt-get install qdbus # will remove qdbus:i386 and install qdbus
# Disable /etc/dpkg/dpkg.cfg.d/multiarch again - add a "#" at the beginning of the line it contains.
aptitude update
aptitude -f install # finally clean
aptitude dist-upgrade # also happy again

So this bug only affects people using 64 bit installs?

I'd still like a better understanding of what my options are if I need to install 64 bit software.