See downstream report: https://bugs.archlinux.org/task/23912 Xfce's terminal and other terminal are no more transparent.
also breaks conky transparency
*** Bug 7535 has been marked as a duplicate of this bug. ***
Affects Xchat too: https://bugs.gentoo.org/show_bug.cgi?id=365839
This bug was introduced via the crash fix patch in: https://bugzilla.xfce.org/show_bug.cgi?id=7442
(Also breaks gkrellm transparency)
*** This bug has been marked as a duplicate of bug 7442 ***