I went to file it upstream, but it look like it's already been filed, and is a "won't fix" :( https://bugzilla.mozilla.org/show_bug.cgi?id=917742
** Bug watch added: Mozilla Bugzilla #917742 https://bugzilla.mozilla.org/show_bug.cgi?id=917742 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1228009 Title: Regression: Zebra striping is no longer present To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1228009/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs