xfce4-xmms-controller-plugin Undefined symbol "pthread_mutex_trylock"

[jimmie james]

After running gnome_update.sh (and getting around the gnomevfs2 issue)
and a fresh cvsup of ports at around 2pm EST, installing the
multimedia/xfce4-xmms-controller-plugin on 4.10-STABLE, and relauncing
the xfce4-panel, I'm getting:

** (xfce4-panel:81087): WARNING **: xfce4-panel: module
/usr/X11R6/lib/xfce4/panel-plugins/libxfcexmms.so cannot be opened
(/usr/local/lib/libgthread12.so.3: Undefined symbol
"pthread_mutex_trylock")

Searching the lists suggests that it's a libxml2 issue, and to
recompile without threads, so, make rmconfig, recompile libxml2
(choose defaults, threads where off) and I'm still getting the error.

Hints, suggestions?

I would submit a PR, but no reverse DNS(dialup) and gtk-send-pr seems
to never make it to the list.

libxml-1.8.17_3     Xml parser library for GNOME
libxml2-2.6.16      XML parser library for GNOME
py23-libxml2-2.6.16 Python interface for XML parser library for GNOME