MixMonitor casues asterisk 1.2.3 to terminate

I am testing MixMonitor on Asterisk 1.2.3 on FreeBSD 5.4

The following batch of extensions:

exten => 299,1,Answer()
exten => 299,n,MixMonitor(manuel.gsm)
exten => 299,n,SayDigits(12345670)
exten => 299,n,StopMonitor()
exten => 299,n,Hangup()

runs ok until hangup. At that point Asterisk terminates. (That is the process terminates with a signal 11)

We are uncertain at this point whether this is a bug or just some anomaly with my system. Would really appreciate confirmation of this actin on somebody else’s FreeBSD system. If you are willing to test it,please report your FreeBSD version when you respond.