I can reproduce the error too in my Hardy. Markup works for additional text but not for summary. I found this bug report when investigating the issue.
-- [Hardy] Markup not supported in libnotify when used in the summary part https://bugs.launchpad.net/bugs/225128 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
