Here's an xsession.errors file from just after the error appeared :-)
** Attachment added: ".xsession-errors" https://bugs.launchpad.net/unity-2d/+bug/758787/+attachment/2093676/+files/.xsession-errors -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/758787 Title: [launcher] The first item loses its tooltip -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs