raymears@raymears-VAIO:~$ sudo aptitude install  libffi6:i386
The following NEW packages will be installed:
  gcc-4.6-base{a} libc6{a} libffi6{b} libgcc1{a}
0 packages upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
Need to get 32.6 kB/3,885 kB of archives. After unpacking 10.5 MB will be used.
The following packages have unmet dependencies:
  libffi6: Breaks: libffi6 (!= 3.0.11~rc1-5~oneiric1) but 3.0.11~rc1-2 is to be installed.
  libffi6: Breaks: libffi6 (!= 3.0.11~rc1-2) but 3.0.11~rc1-5~oneiric1 is installed.
The following actions will resolve these dependencies:

     Keep the following packages at their current version:
1)     libc6 [Not Installed]
2)     libffi6 [Not Installed]
3)     libgcc1 [Not Installed]



Accept this solution? [Y/n/q/?] q
Abandoning all efforts to resolve these dependencies.
Abort.