DCCM looping

OK, I've started seeing dccm looping now.  Solaris 9 (x86), compiled 
with the Studio compiler.  I suspect these are the looping threads:

-----------------  lwp# 2067 / thread# 2067  --------------------
 08064cae dcc_ck_body (80f0310, 83dea08, 4214) + 146
 0805955a dccm_body (83a9c08, 83dea08, 4214) + 3a
 08061240 st_bodychunk (c363df60) + 28
 08060771 mi_engine (83a9c08) + 20d
 0805f23c mi_handle_session (83a9c08) + 30
 0805e8fe mi_thread_handle_wrapper (83a9c08) + e
 c44b4583 _thr_setup (c2432e00) + 40
 c44b4800 _lwp_start ()
-----------------  lwp# 344 / thread# 344  --------------------
 08064bc2 dcc_ck_body (80f559c, 838dd50, 7e9) + 5a
 0805955a dccm_body (8387408, 838dd50, 7e9) + 3a
 08061240 st_bodychunk (c413df60) + 28
 08060771 mi_engine (8387408) + 20d
 0805f23c mi_handle_session (8387408) + 30
 0805e8fe mi_thread_handle_wrapper (8387408) + e
 c44b4583 _thr_setup (c4490800) + 40
 c44b4800 _lwp_start ()
-----------------  lwp# 373 / thread# 373  --------------------
 08064bba dcc_ck_body (81386b8, 83c9b58, 7e9) + 52
 0805955a dccm_body (83753b0, 83c9b58, 7e9) + 3a
 08061240 st_bodychunk (c132df60) + 28
 08060771 mi_engine (83753b0) + 20d
 0805f23c mi_handle_session (83753b0) + 30
 0805e8fe mi_thread_handle_wrapper (83753b0) + e
 c44b4583 _thr_setup (c2432400) + 40
 c44b4800 _lwp_start ()

(The rest are in poll, cond_wait, sigwait, or nanosleep.)

Is there a known issue here, or am I going to have to start digging 
around for the problematic messages ?  I can see that's going to be tricky.

Cheers,

Rob

-- 
E-Mail:	Rob.McMahon@warwick.ac.uk		PHONE:  +44 24 7652 3037
Rob McMahon, IT Services, Warwick University, Coventry, CV4 7AL, England