asterisk users - Jul 2005 - unable to disconnect a bridged channel

Hi,
i've just faced with some bridged calls which could not be hungup just
killing the asterisk process solved the problem:

Zap/63-1  (incoming   s            1   )      Up Bridged Call  SIP/2035-e9cb

logs say:

Jul 22 14:54:12 NOTICE[17161] chan_sip.c: Disconnecting call
'SIP/2035-e9cb' for lack of RTP activity in 6785 seconds
Jul 22 14:54:13 NOTICE[17161] chan_sip.c: Disconnecting call
'SIP/2035-e9cb' for lack of RTP activity in 6786 seconds
...
warning:Jul 22 14:54:36 WARNING[26237] channel.c: Avoided initial
deadlock for '0xb7c861b8', 10 retries!
warning:Jul 22 14:54:36 WARNING[26237] channel.c: Avoided initial
deadlock for '0xb7c861b8', 10 retries!
warning:Jul 22 14:54:37 WARNING[26237] channel.c: Avoided initial
deadlock for '0xb7c861b8', 10 retries!
... tones of these messages...

I'm using latest CVS HEAD.
thanks,
Paradise Dove