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")

I can't figure it out. (even re-ran gnome_update.sh)

If more info is needed, please ask.