asterisk users - May 2006 - problems with TXfax

hello,

*CLI> debug level 99 /tmp/aqq
Debugging level set to 99, file '/tmp/aqq'
*CLI>
*CLI>
   == Manager 'admin' logged on from 127.0.0.1
     -- Requested transfer capability: 0x00 - SPEECH
May 25 22:27:41 NOTICE[27407]: channel.c:2422 __ast_request_and_dial: 
Don't know what to do with control frame 15
        > Channel Zap/1-1 was answered.
        > Launching 
txfax(/var/spool/asterisk/fax/QWWWxx61763.tif|caller) on Zap/1-1
     -- Channel 0/1, span 1 got hangup request
*** glibc detected *** double free or corruption (!prev): 0x081d1768 ***



*CLI> show version
Asterisk 1.2.7.1 built by root @ ivr on a i686 running Linux on 
2006-05-25 09:09:37 UTC


using: 
http://www.soft-switch.org/downloads/spandsp/spandsp-0.0.2pre25/spandsp-0.0.2pre25.tar.gz
and
http://www.soft-switch.org/downloads/spandsp/spandsp-0.0.2pre25/asterisk-1.2.x/app_txfax.c

same error on * 1.2.4 and 1.2.5.

any help?

-- 
Krzysztof Drewicz
Affordable 2/4 span E1/T1 PCI-cards. 100% Asterisk compatible.
See http://4e1.pl