Comment 11 for bug 192934

Just to bring to your notice, this bug is _almost_ identical to Bug #153518, but that's in Gnome. I figured out a workaround to solve the issue (https://bugs.launchpad.net/ubuntu/+source/at-spi/+bug/153518/comments/25). I hope that helps in narrowing down what the issue is in Xfce / Gnome.