Comment 3 for bug 555155

I see this problem in Lucid Lynx (10.4 LTS Beta 2) the install was a clean Beta 1 that got upgraded to Beta 2.
And when I tried to install gnome-shell, never installed on this machine before, it stops with libgjs0 dependencies and the xul-runner issue as listed above.

jpt@jpt-laptop:~$ sudo apt-get install gnome-shell
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  gnome-shell: Depends: libgjs0 but it is not going to be installed
E: Broken packages

jpt@jpt-laptop:~$ sudo apt-get install libgjs0
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  libgjs0: Depends: xulrunner-1.9.1 (<= 1.9.1.9~) but 1.9.1.9+nobinonly-0ubuntu1 is to be installed
E: Broken packages