tom@ubuntu:~$ sudo apt-get remove compiz-gnome
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run `apt-get -f install' to correct these:
The following packages have unmet dependencies:
  compiz: Depends: compiz-decorator
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).


tom@ubuntu:~$ sudo apt-get -f install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
  compiz-gnome
The following packages will be upgraded:
  compiz-gnome
1 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.
7 not fully installed or removed.
Need to get 0B/162kB of archives.
After unpacking 893kB of additional disk space will be used.
Do you want to continue [Y/n]? Y
(Reading database ... 104175 files and directories currently installed.)
Preparing to replace compiz-gnome 1:0.3.6-1ubuntu13 (using .../compiz-gnome_1%3a0.5.5~git20070824+3v1ubuntu0_i386.deb) ...
Unpacking replacement compiz-gnome ...
dpkg: error processing /var/cache/apt/archives/compiz-gnome_1%3a0.5.5~git20070824+3v1ubuntu0_i386.deb (--unpack):
 trying to overwrite `/usr/lib/compiz/libgconf.so', which is also in package compiz-plugins
Errors were encountered while processing:
 /var/cache/apt/archives/compiz-gnome_1%3a0.5.5~git20070824+3v1ubuntu0_i386.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)