cannot install skype on unstable

[Jonathan Wheelhouse <jonathan.wheelhouse@gmail.com>]

Hi

I used to have skype installed but I think a recent dist-upgrade got rid
of it (now my wife _really_ wants it back).

/etc/apt/sources.list has 
deb http://people.debian.org/~rafael/skype-amd64 ./

# aptitude install skype

produces

The following packages are BROKEN:
  libc6-i386 
The following NEW packages will be installed:
  ia32-libs{a} ia32-libs-gtk{a} lib32asound2{a} lib32gcc1{a} lib32ncurses5{a} lib32stdc++6{a} lib32z1{a} skype 
0 packages upgraded, 8 newly installed, 0 to remove and 0 not upgraded.
Need to get 55.8MB of archives. After unpacking 123MB will be used.
The following packages have unmet dependencies:
  libc6-i386: Breaks: ia32-libs (<= 2.7) but 2.7 is to be installed.
              Breaks: ia32-libs-gtk (<= 2.7) but 2.7 is to be installed.
              Breaks: lib32asound2 (<= 1.0.20-2) but 1.0.20-2 is to be installed.
              Breaks: lib32ncurses5 (<= 5.7+20090523-1) but 5.7+20090523-1 is to be installed.
              Breaks: lib32z1 (<= 1:1.2.3.3.dfsg-13) but 1:1.2.3.3.dfsg-13 is to be installed.


I'm not sure what's going on here; libc6-i386 seems to break the other
libraries; apparently <= 2.7 but 2.7 is to be installed; that's still
OK, isn't it?  Less than or equal to 2.7 still matches 2.7 so what's
going on?

--
Jonathan