This bug was fixed in the package thunderbird - 14.0+build1-0ubuntu0.12.04.1

---------------
thunderbird (14.0+build1-0ubuntu0.12.04.1) precise-security; urgency=low

  * New upstream stable release (THUNDERBIRD_14_0_BUILD1)
    - see LP: #1024564 for USN information

  [ Chris Coulson <email address hidden> ]
  * Update globalmenu-extension to 3.2.5
    - Fix a crash in uGlobalMenu::RecycleList::~RecycleList()
    - Fix LP: #1010580 - update the window event timestamp when handling
      menu events
  * Drop patches fixed upstream
    - remove debian/patches/revert-bmo621446-investigation.patch
    - update debian/patches/series
  * Update desktop file translations
    - update debian/thunderbird.desktop.in
  * Ensure that additional actions in the desktop file match the fd.o spec
    in precise
    - update debian/thunderbird.desktop.in
    - update debian/rules
  * Add application/x-xpinstall to the MimeType field of the desktop file
    - update debian/thunderbird.desktop.in
  * Drop almost all mimetypes from the desktop file. Thunderbird won't display
    any of them if you invoke it with files of these types. It will just
    open a Compose window and add the file as an attachment
    - update debian/thunderbird.desktop.in
  * Drop the ability to select between tree/system libraries using a single
    option in debian/rules. It adds additional complexity and was never used
    - update debian/config/mozconfig.in
    - update debian/control.in
    - update debian/thunderbird-dev.links.in
    - update debian/rules
  * Shuffle the order of google-breakpad/src/common/dwarf/Makefile.in to fix a
    variable substitution issue, which was causing some objects to be built with
    the wrong compiler flags, resulting in dump_syms crashing (LP: #1002590)
    - add debian/patches/fix-makefile-substitution-bug.patch
  * Don't set LD_LIBRARY_PATH in our shell wrapper, and install
    dependentlibs.list instead now
    - update debian/thunderbird.sh.in
    - update debian/thunderbird.install.in
  * Drop StartupWMClass from the desktop file now that WM_CLASS is the same
    as the binary name (also fixes LP: #1012158)
    - update debian/thunderbird.desktop.in
    - update debian/rules
  * Apport hook improvements:
    - Sort preferences alphabetically in the apport data
    - Treat preferences set in default addons as default prefs so that
      they don't show up in apport data, unless the preference files have
      been modified
    - Support random pref files dropped in to the Thunderbird install folder,
      and preferences from application bundles
    - Fix ordering issues when loading preferences
  * Update the Apport blacklist file after dropping thunderbird-bin
    - update debian/apport/blacklist.in

  [ David Planella <<email address hidden> > ]
  * Add Catalan keywords
    - update debian/thunderbird.desktop.in

  [ Ben Collins <email address hidden> ]
  * Cherry pick patch from aurora to use YARR interpreter on ppc
    - update debian/patches/fix-build-failure-without-yarr-jit.patch
    - update debian/patches/series
  * Fix ppc build due to new dtoa library
    - add debian/patches/fix-dtoa-build-on-ppc.patch
    - update debian/patches/series
 -- Chris Coulson <email address hidden>   Fri, 13 Jul 2012 22:59:01 +0100