I fixed the install by mv the current Trolltech.conf file to Trolltech.conf.bak and running apt-get -f install. After running apt-get Trolltech.conf does not exist so I don't know why it's complaining if it's not going to write anything.
ls /etc/xdg/ autostart menus sni-qt.conf systemd Thunar Trolltech.conf.bak tumbler user-dirs.conf user-dirs.defaults xdg-xubuntu xfce4 This happened when I tried to install git-cola -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to qt4-x11 in Ubuntu. https://bugs.launchpad.net/bugs/1578430 Title: package libqtcore4 4:4.8.7+dfsg-5ubuntu2 failed to install/upgrade: trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:i386 Status in One Hundred Papercuts: Confirmed Status in qt4-x11 package in Ubuntu: Confirmed Bug description: Happened while installing skype ProblemType: Package DistroRelease: Ubuntu 16.04 Package: libqtcore4 4:4.8.7+dfsg-5ubuntu2 ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6 Uname: Linux 4.4.0-21-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 Date: Wed May 4 19:07:03 2016 DuplicateSignature: Unpacking libqtcore4:i386 (4:4.8.7+dfsg-5ubuntu2) ... dpkg: error processing archive /var/cache/apt/archives/libqtcore4_4%3a4.8.7+dfsg-5ubuntu2_i386.deb (--unpack): trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:i386 ErrorMessage: trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:i386 InstallationDate: Installed on 2016-04-10 (24 days ago) InstallationMedia: Lubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) RelatedPackageVersions: dpkg 1.18.4ubuntu1 apt 1.2.10ubuntu1 SourcePackage: qt4-x11 Title: package libqtcore4 4:4.8.7+dfsg-5ubuntu2 failed to install/upgrade: trying to overwrite shared '/etc/xdg/Trolltech.conf', which is different from other instances of package libqtcore4:i386 UpgradeStatus: Upgraded to xenial on 2016-04-22 (12 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/hundredpapercuts/+bug/1578430/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp