I tried: $ sudo apt-get remove --purge --force apturl-common but was told E: Command line option --force is not understood so I tried again, but without that option: $ sudo apt-get remove --purge apturl-common Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED apturl* apturl-common* ubufox* xul-ext-ubufox* 0 upgraded, 0 newly installed, 4 to remove and 0 not upgraded. After this operation, 725 kB disk space will be freed. Do you want to continue [Y/n]? (Reading database ... 207401 files and directories currently installed.) Removing ubufox ... Removing xul-ext-ubufox ... Purging configuration files for xul-ext-ubufox ... Removing apturl ... Removing apturl-common ... Purging configuration files for apturl-common ... Processing triggers for man-db ... Processing triggers for gconf2 ... Processing triggers for desktop-file-utils ... Processing triggers for gnome-menus ... Processing triggers for bamfdaemon ... Rebuilding /usr/share/applications/bamf.index... Then I reinstalled: $sudo apt-get install apturl-common Reading package lists... Done Building dependency tree Reading state information... Done The following package was automatically installed and is no longer required: gir1.2-webkit-3.0 Use 'apt-get autoremove' to remove them. The following NEW packages will be installed apturl-common 0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/11.5 kB of archives. After this operation, 184 kB of additional disk space will be used. Selecting previously deselected package apturl-common. (Reading database ... 207323 files and directories currently installed.) Unpacking apturl-common (from .../apturl-common_0.5.1ubuntu1_amd64.deb) ... Processing triggers for desktop-file-utils ... Processing triggers for gnome-menus ... Processing triggers for bamfdaemon ... Rebuilding /usr/share/applications/bamf.index... Processing triggers for man-db ... Setting up apturl-common (0.5.1ubuntu1) ... Then I autoremoved as suggested: $ sudo apt-get autoremove Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED gir1.2-webkit-3.0 0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded. After this operation, 299 kB disk space will be freed. Do you want to continue [Y/n]? (Reading database ... 207349 files and directories currently installed.) Removing gir1.2-webkit-3.0 ... Then I tried: $ apturl Please install apturl-gtk or apturl-kde. There is no such package as apturl-gtk so I couldn't do what it suggested. (Another bug I suppose.) But there is a package called apturl, which was removed earlier, so I installed that instead: $ sudo apt-get install apturl Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: gir1.2-webkit-3.0 The following NEW packages will be installed apturl gir1.2-webkit-3.0 0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 58.9 kB/68.0 kB of archives. After this operation, 463 kB of additional disk space will be used. Do you want to continue [Y/n]? Get:1 http://gb.archive.ubuntu.com/ubuntu/ oneiric/main gir1.2-webkit-3.0 amd64 1.4.3-0ubuntu3 [58.9 kB] Fetched 58.9 kB in 0s (239 kB/s) Selecting previously deselected package gir1.2-webkit-3.0. (Reading database ... 207344 files and directories currently installed.) Unpacking gir1.2-webkit-3.0 (from .../gir1.2-webkit-3.0_1.4.3-0ubuntu3_amd64.deb) ... Selecting previously deselected package apturl. Unpacking apturl (from .../apturl_0.5.1ubuntu1_amd64.deb) ... Processing triggers for gconf2 ... Processing triggers for man-db ... Setting up gir1.2-webkit-3.0 (1.4.3-0ubuntu3) ... Setting up apturl (0.5.1ubuntu1) ... Then I tried to launch apturl again and got the same error as before, so this hasn't helped unfortunately: $ apturl (apturl-gtk:3071): Gtk-WARNING **: Unknown property: GtkDialog.has-separator ERROR:root:importing aptdaemon Traceback (most recent call last): File "/usr/lib/python2.7/dist-packages/AptUrl/gtk/backend/__init__.py", line 48, in get_backend from InstallBackendAptdaemon import InstallBackendAptdaemon File "/usr/lib/python2.7/dist-packages/AptUrl/gtk/backend/InstallBackendAptdaemon.py", line 10, in from UpdateManager.backend import InstallBackend ImportError: No module named backend Traceback (most recent call last): File "/usr/bin/apturl-gtk", line 44, in ui = GtkUI() File "/usr/lib/python2.7/dist-packages/AptUrl/gtk/GtkUI.py", line 30, in __init__ self.backend = get_backend(self.dia) File "/usr/lib/python2.7/dist-packages/AptUrl/gtk/backend/__init__.py", line 56, in get_backend from InstallBackendSynaptic import InstallBackendSynaptic File "/usr/lib/python2.7/dist-packages/AptUrl/gtk/backend/InstallBackendSynaptic.py", line 12, in from UpdateManager.backend import InstallBackend ImportError: No module named backend