I'm not sure whether it's related, but my install process - which exhibited the errors above - culminated in this:


dpkg: error processing libgtk2.0-0 (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of librsvg2-common:
 librsvg2-common depends on libgdk-pixbuf2.0-0 (>= 2.22.0); however:
  Package libgdk-pixbuf2.0-0 is not configured yet.
 librsvg2-common depends on libgtk2.0-0 (>= 2.21.5); however:
  Package libgtk2.0-0 is not configured yet.
 librsvg2-common depends on librsvg2-2 (= 2.36.1-0ubuntu1); however:
  Package librsvg2-2 is not configured yet.
dpkg: error processing librsvg2-common (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of libgdk-pixbuf2.0-dev:
 libgdk-pixbuf2.0-dev depends on libgdk-pixbuf2.0-0 (= 2.26.1-1); however:
  Package libgdk-pixbuf2.0-0 is not configured yet.
 libgdk-pixbuf2.0-dev depNo apport report written because MaxReports is reached already
       No apport report written because MaxReports is reached already
                                                                     No apport report written because MaxReports is reached already
                                                   ends on gir1.2-gdkpixbuf-2.0 (= 2.26.1-1); however:
  Package gir1.2-gdkpixbuf-2.0 is not configured yet.
dpkg: error processing libgdk-pixbuf2.0-dev (--configure):
 dependency problems - leaving unconfigured
Setting up libatk1.0-dev (2.4.0-0ubuntu1) ...
Setting up xorg-sgml-doctools (1:1.10-1) ...
Setting up libxext-dev (2:1.3.0-3build1) ...
Setting up libxinerama-dev (2:1.1.1-3build1) ...
Setting up libxi-dev (2:1.6.0-0ubuntu2) ...
Setting up x11proto-fixes-dev (1:5.0-2ubuntu1) ...
Setting up libxfixes-dev (1:5.0-4ubuntu4) ...
Setting up libxcomposite-dev (1:0.4.3-2build1) ...
Setting up libxdamage-dev (1:1.1.3-2build1) ...
Setting up libxml2-utils (2.7.8.dfsg-5.1ubuntu4) ...
dpkg: dependency problems prevent configuration of gir1.2-gtk-2.0:
 gir1.2-gtk-2.0 depends on gir1.2-gdkpixbuf-2.0; however:
  Package gir1.2-gdkpixbuf-2.0 is not configured yet.
 gir1.2-gtk-2.0 depends on libgtk2.0-0 (>= 2.24.0); however:
  Package libgtk2.0-0 is not configured yet.
dpkg: error processing gir1.2-gtk-2.0 (--configure):
 dependency problems - leaving unconfigured
dpkg: too many errors, stopping
Processing triggers for libc-bin ...
No apport report written because MaxReports is reached already
                                                              ldconfig deferred processing now taking place
Errors were encountered while processing:
 libtiff4
 libgdiplus
 libmono-system-web2.0-cil
 libmono2.0-cil
 libmono-system-drawing4.0-cil
 libmono-system-web4.0-cil
 libmono-http4.0-cil
 libmono-microsoft-web-infrastructure1.0-cil
 libmono-system-windows-forms4.0-cil
 libmono-system-messaging4.0-cil
 libmono-system-servicemodel4.0-cil
 libmono-system-web-extensions4.0-cil
 libmono-system-servicemodel-web4.0-cil
 libmono-system-data-services4.0-cil
 libmono-system-drawing-design4.0-cil
 libmono-system-design4.0-cil
 libmono-system-runtime2.0-cil
 libmono-system-runtime4.0-cil
 libmono-system-servicemodel-discovery4.0-cil
 libmono-system-servicemodel-routing4.0-cil
 libmono-system-serviceprocess4.0-cil
 libmono-system-web-abstractions4.0-cil
 libmono-system-web-dynamicdata4.0-cil
 libmono-system-web-extensions-design4.0-cil
 libmono-system-web-mvc1.0-cil
 libmono-system-web-mvc2.0-cil
 libmono-system-web-routing4.0-cil
 libmono-system-windows-forms-datavisualization4.0-cil
 libmono-winforms2.0-cil
 libnunit2.5-cil
 libnunit-cil-dev
 libmono-cil-dev
 mono-devel
 libjasper1
 libgdk-pixbuf2.0-0
 libcogl9
 gir1.2-cogl-1.0
 libcogl-pango0
 gir1.2-coglpango-1.0
 gir1.2-gdkpixbuf-2.0
 libgtk-3-0
 gir1.2-gtk-3.0
 libclutter-1.0-0
 gir1.2-clutter-1.0
 librsvg2-2
 librsvg2-bin
 gir1.2-rsvg-2.0
 libgtk2.0-0
 librsvg2-common
 libgdk-pixbuf2.0-dev
 gir1.2-gtk-2.0
Processing was halted because there were too many errors.


I'm going to close and try re-running the upgrade.