i386: firefox: "dead lock detected"

[Kurt Schreiner <ks%ub.uni-mainz.de@localhost>]

Hi,

after upgrading kernel, userland and pkgsrc on my T43p (i386) to
what was -current at Mar 27 2011, 11:06 MEST, (native) firefox
just says "dead lock detected" and exits.

kdump shows:

  [...]
  2181      1 xulrunner-bin RET   _lwp_self 1
  2181      1 xulrunner-bin CALL  _lwp_self
  [... another real lot of these ...]
  2181      1 xulrunner-bin RET   _lwp_self 1
  2181      1 xulrunner-bin CALL  _lwp_self
  2181      1 xulrunner-bin RET   _lwp_self 1
  2181      1 xulrunner-bin CALL  _lwp_self
  2181      1 xulrunner-bin RET   _lwp_self 1
  2181      1 xulrunner-bin CALL  write(2,0xbfbfe768,0x12)
  2181      1 xulrunner-bin GIO   fd 2 wrote 18 bytes
       "dead lock detected"
  2181      1 xulrunner-bin RET   write 18/0x12
  2181      1 xulrunner-bin CALL  write(2,0xbbbfd44b,1)
  2181      1 xulrunner-bin GIO   fd 2 wrote 1 bytes
       "\n"
  2181      1 xulrunner-bin RET   write 1
  2181      1 xulrunner-bin CALL  exit(1)

Any idea anyone how to remedy this?

Kurt