firefox stuck in libthr

Firefox seems to have got stuck inside libthr.

(gdb) 
#0  0x49d307d3 in ?? () from /lib/libthr.so.3
#1  0x49d2a582 in ?? () from /lib/libthr.so.3
#2  0x49d2fed2 in ?? () from /lib/libthr.so.3
#3  0x49d32eb5 in ?? () from /lib/libthr.so.3
#4  0x49ceab82 in pthread_cond_timedwait () from /lib/libc.so.7
#5  0x49972865 in ?? () from /usr/local/lib/libplds4.so.1
#6  0x4b7f8784 in ?? ()
#7  0x4b7f27e0 in ?? ()
#8  0xbe8ededc in ?? ()
#9  0x49ce9914 in pthread_getspecific () from /lib/libc.so.7
#10 0x499736ea in PR_WaitCondVar () from /usr/local/lib/libplds4.so.1
#11 0x483f91bf in ?? () from /usr/local/lib/firefox/libxul.so
#12 0x4b7f8780 in ?? ()
#13 0x000493e0 in ?? ()
#14 0xbe8edf34 in ?? ()
#15 0x00000000 in ?? ()

I'll see if I can get more information once I rebuild
libthr with debugging symbols and firefox as well.

-- 
Steve