firefox 1.0.6 on -current crashes

  I have the following crash on -current (
FreeBSD 7.0-CURRENT #2: Mon Jul 25 23:07:56 
JST 2005 Xeon X 2, SMP ) with firefox 1.0.6_1.

  Any fixes?

  :        :        :        :
Fatal error 'Recurse on a private mutex.' at line 988 in file /usr/src/lib/libpthread/thread/thr_mutex.c (errno = 0)
Abort trap (core dumped)