package libappindicator0.1-cil 0.2.96-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 9

Relevant part of the log:

* Installing 1 assembly from libdbus1.0-cil into Mono

** (/usr/lib/mono/2.0/gacutil.exe:17198): WARNING **: The following assembly referenced from /usr/lib/mono/2.0/gacutil.exe could not be loaded:
     Assembly: Mono.Security (assemblyref_index=1)
     Version: 2.0.0.0
     Public Key: 0738eb9f132ed756
The assembly was not found in the Global Assembly Cache, a path listed in the MONO_PATH environment variable, or in the location of the executing assembly (/usr/lib/mono/2.0/).

** (/usr/lib/mono/2.0/gacutil.exe:17198): WARNING **: Could not load file or assembly 'Mono.Security, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756' or one of its dependencies.

Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'Mono.Security, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756' or one of its dependencies.
File name: 'Mono.Security, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756'
  at Mono.Tools.Driver.LoadConfig (Boolean quiet) [0x00000] in <filename unknown>:0
  at Mono.Tools.Driver.Main (System.String[] args) [0x00000] in <filename unknown>:0
E: installing Assembly /usr/lib/cli/dbus-sharp-1.0/dbus-sharp.dll failed
E: Installation of libdbus1.0-cil with /usr/share/cli-common/runtimes.d/mono failed
dpkg: error processing libdbus1.0-cil (--configure):
 subprocess installed post-installation script returned error exit status 9
dpkg: dependency problems prevent configuration of gnome-do-plugins:
 gnome-do-plugins depends on libdbus1.0-cil (>= 0.7); however:
  Package libdbus1.0-cil is not configured yet.
dpkg: error processing gnome-do-plugins (--configure):
 dependency problems - leaving unconfigured
Setting up libappindicator0.1-cil (0.2.96-0ubuntu1) ...
* Installing 3 assemblies from libappindicator0.1-cil into Mono

** (/usr/lib/mono/2.0/gacutil.exe:17210): WARNING **: The following assembly referenced from /usr/lib/mono/2.0/gacutil.exe could not be loaded:
     Assembly: Mono.Security (assemblyref_index=1)
     Version: 2.0.0.0
     Public Key: 0738eb9f132ed756
The assembly was not found in the Global Assembly Cache, a path listed in the MONO_PATH environment variable, or in the location of the executing assembly (/usr/lib/mono/2.0/).

** (/usr/lib/mono/2.0/gacutil.exe:17210): WARNING **: Could not load file or assembly 'Mono.Security, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756' or one of its dependencies.

Unhandled Exception: System.IO.FileNotFoundException: Could not load file or assembly 'Mono.Security, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756' or one of its dependencies.
File name: 'Mono.Security, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756'
  at Mono.Tools.Driver.LoadConfig (Boolean quiet) [0x00000] in <filename unknown>:0
  at Mono.Tools.Driver.Main (System.String[] args) [0x00000] in <filename unknown>:0
E: installing Assembly /usr/lib/cli/appindicator-sharp-0.1/appindicator-sharp.dll failed
E: Installation of libappindicator0.1-cil with /usr/share/cli-common/runtimes.d/mono failed
dpkg: error processing libappindicator0.1-cil (--config...

Could anyone please post the output of the following command:
ls -l /usr/lib/mono/2.0/gacutil.exe

mole@tm800-500gb:~$ ls -l /usr/lib/mono/2.0/gacutil.exe
-rwxr-xr-x 1 root root 28160 2011-02-21 03:33 /usr/lib/mono/2.0/gacutil.exe

I hope this is what is needed...

Yes, thank you, that is what I needed, because on a mailing list (http://lists.ximian.com/pipermail/mono-list/2009-April/042082.html) there was a mail about a problem having the same effects, and the cause was not having the proper permission for the file I've mentioned, but this is not the case here. I can't find the reason.

Status changed to 'Confirmed' because the bug affects multiple users.