1. The evince AppArmor profile is enabled in the default install of
Ubuntu. Thunderbird users clicking on a mailto: link in a PDF are
presented with an error message stating that thunderbird can not be
opened. Under some circumstances, this seems to work ok, but setting the
mailto: application System/Preferences/Preferred Applications via will
trigger the bug. Also, I'm told by the mozilla team that the
thunderbird3 path needs to be added for the pending 3.0 - 3.1 migration.

2. The following is now being used in /etc/apparmor.d/abstractions/ubuntu-email 
in the development release of apparmor (2.5.1~rc1-0ubuntu2):
  /usr/lib/thunderbird-3*/thunderbird{,.sh} PUx,

This line is what should be added to Lucid.

3. attached is the proposed patch

4. TEST CASE:
a) install thunderbid with 'sudo apt-get install thunderbird'
b) go to System/Preferences/Preferred Applications and select Thunderbird as 
the mail reader
c) open the attached test_hyperlink.pdf (from lp:qa-regression-testing) and 
click on the email hyperlink

5. The regression potential is considered minimal since only more access
is being allowed in the ubuntu-email abstraction.

** Patch added: "apparmor_2.5-0ubuntu3.1.debdiff"
   
https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/648900/+attachment/1644381/+files/apparmor_2.5-0ubuntu3.1.debdiff

-- 
mailto from evince broken for thunderbird
https://bugs.launchpad.net/bugs/648900
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