asterisk users - Jan 2004 - Possible Bug: Crash when Parking Calls

Hi,

I'm relativle new to *, so I may be wrong. I build up * from cvs today
(show version: CVS-01/15/04-16:27:36). In an test I use 2 SIP phones
(linphone) to connect to eachother. 
The phones are called via the extensions 100 (user 'kwe') and 200 (user
'phone').

I can call from one to another and I can park a call and take it again:
	
1) call from 100 to 200
2) press # and dial 700 on phone '200'
3) hear the voice and get the call back (dial 701 on phone '200')

the steps can be repeated. But * crahes if I do the following during the
same call:
4) pree # and dial 700 on phone '100'

I can reproduce this. Every time I park a call first on one end and
lateron on the other end, * crahes. On console I see the following:

-------snip-------
    -- Called phone
    -- SIP/phone-c9da is ringing
    -- SIP/phone-c9da answered SIP/kwe-9857
    -- Attempting native bridge of SIP/kwe-9857 and SIP/phone-c9da
    -- Started music on hold, class 'default', on SIP/kwe-9857
    -- Playing 'pbx-transfer' (language 'de')
    -- Stopped music on hold on SIP/kwe-9857
    -- Started music on hold, class 'default', on SIP/kwe-9857
  == Parked SIP/kwe-9857 on 701
    -- Playing 'digits/7' (language 'de')
    -- Playing 'digits/0' (language 'de')
    -- Playing 'digits/1' (language 'de')
  == Spawn extension (default, 200, 1) exited KEEPALIVE on
'SIP/kwe-9857'
    -- Executing ParkedCall("SIP/phone-b583", "701") in new
stack
    -- Stopped music on hold on SIP/kwe-9857
    -- Channel SIP/phone-b583 connected to parked call 701
    -- Attempting native bridge of SIP/kwe-9857 and SIP/phone-b583
    -- Started music on hold, class 'default', on SIP/phone-b583
    -- Playing 'pbx-transfer' (language 'de')
    -- Stopped music on hold on SIP/phone-b583
    -- Started music on hold, class 'default', on SIP/phone-b583
  == Parked SIP/phone-b583 on 701
    -- Playing 'digits/7' (language 'de')
    -- Playing 'digits/0' (language 'de')
    -- Playing 'digits/1' (language 'de')
  == Spawn extension (default, 701, 1) exited non-zero on
'SIP/phone-b583'
    -- Stopped music on hold on SIP/phone-b583
pbx*CLI>
Disconnected from Asterisk server
Executing last minute cleanups

-------snip-------

I would be glad, if someone could give me some information:
a) Yes I can reproduce this
b) Yes, it's a known bug
c) No, I can not reproduce this
In case of c): could You please give me some advise, how to locate the
error?

Thanks in advance
Karsten