[Hoary] Cannot install ubuntu-desktop due to contact-lookup-applet problem

[Daniel Robitaille]

I haven't been able to install ubuntu-desktop in the last few days on
my Hoary machine:

$sudo apt-get install ubuntu-desktop
...
The following packages have unmet dependencies:
  ubuntu-desktop: Depends: contact-lookup-applet but it is not going
to be installed
E: Broken packages


$ sudo apt-get install contact-lookup-applet
...
The following packages have unmet dependencies:
  contact-lookup-applet: Depends: libebook1.2-0 (>= 1.1.0) but it is
not installable
E: Broken packages

But it seems only libebook1.2-3 is available in main, and it is
already installed on my machine.