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The following NEW packages will be installed:
  libgtk-3-0
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
17 not fully installed or removed.
Need to get 0 B/2,230 kB of archives.
After this operation, 8,719 kB of additional disk space will be used.
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Preparing to unpack .../libgtk-3-0_3.14.15-0ubuntu1_amd64.deb ...
Unpacking libgtk-3-0:amd64 (3.14.15-0ubuntu1) ...
dpkg: error processing archive /var/cache/apt/archives/libgtk-3-0_3.14.15-0ubuntu1_amd64.deb (--unpack):
 trying to overwrite shared '/etc/gtk-3.0/settings.ini', which is different from other instances of package libgtk-3-0:amd64
Errors were encountered while processing:
 /var/cache/apt/archives/libgtk-3-0_3.14.15-0ubuntu1_amd64.deb