PS. it seems to be important that feisty Thunderbird version is used to repeat the bug. As others on mailing list confirmed this bug does not happen with edgys 1.5.0.10 Thunderbird.
-- [Feisty] smiley in Thunderbird not visible https://launchpad.net/bugs/93222 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs