Spinlock problem in 5.3-Beta

[Jason Porter]

I cvsuped last week, on 9 Sept and since then I've installed XMMS and 
mplayer from the ports and neither one of them work, here are the errors 
I receive when I try to start them:

XMMS:
Fatal error 'Spinlock called when not threaded.' at line 83 in file 
/usr/src/lib/libpthread/thread/thr_spinlock.c (errno = 0)
Segmentation fault (core dumped)

mplayer:
Fatal error 'Spinlock called when not threaded.' at line 83 in file 
/usr/src/lib/libpthread/thread/thr_spinlock.c (errno = 0)
Abort trap (core dumped)

I'm not sure if this is a new feature in 5 or a debugging problem or 
what.  Does anyone have any help they can offer?

-Jason Porter