Linphone frequently crashes using G.729 codec

[gdi2k]

I'm on Ubuntu using 12.10 linphone and linphone-plugin-g729 from the PPA here:
https://launchpad.net/~linphone/+archive/release

When using ulaw, things are rock solid, but using G.729 causes linphone to crash a few times per day when in constant use.

linphone is running as an LTSP local app, but that shouldn't make any difference.

I am happy to provide debugging info, but not sure what to include.

[gdi2k (gdi2k)]

To try and provide more useful info, I enabled logging and waited for a crash. Here are the last few seconds:

[20130614-15:39:48] [message] CALL_ACK
[20130614-15:39:48] [message] Samples are back.
[20130614-15:39:48] [warning] Not enough ref samples, using zeroes
[20130614-15:39:48] [message] Samples are back.
[20130614-15:39:49] [message] bandwidth usage: audio=[d=28.2,u=27.3] video=[d=0.0,u=0.0] kbit/sec
[20130614-15:39:49] [message] Thread processing load: audio=8.152800 video=0.000000
[20130614-15:39:50] [message] bandwidth usage: audio=[d=23.9,u=24.4] video=[d=0.0,u=0.0] kbit/sec
[20130614-15:39:50] [message] Thread processing load: audio=12.033092 video=0.000000
[20130614-15:39:51] [message] bandwidth usage: audio=[d=24.1,u=24.1] video=[d=0.0,u=0.0] kbit/sec
[20130614-15:39:51] [message] Thread processing load: audio=13.539887 video=0.000000
[20130614-15:39:51] [message] alsa: sound/wall clock skew is average=-44.164027 ms, instant=-49 ms
[20130614-15:39:51] [message] cb_nict_kill_transaction (id=10)
[20130614-15:39:51] [message] eXosip: timer sec:4 usec:404614!
[20130614-15:39:52] [message] bandwidth usage: audio=[d=24.4,u=24.7] video=[d=0.0,u=0.0] kbit/sec
[20130614-15:39:52] [message] Thread processing load: audio=13.448652 video=0.000000
[20130614-15:39:53] [message] bandwidth usage: audio=[d=23.5,u=24.3] video=[d=0.0,u=0.0] kbit/sec
[20130614-15:39:53] [message] Thread processing load: audio=11.457193 video=0.000000
[20130614-15:39:53] [message] alsa: sound/wall clock skew is average=-45.705027 ms, instant=-48 ms
[20130614-15:39:53] [message] audio_stream_process_rtcp: interarrival jitter=589 , lost packets percentage since last report=0.000000, round trip time=0.188950 seconds
[20130614-15:39:53] [message] MSQosAnalyser: lost_percentage=0.000000, int_jitter=73.625000 ms, rt_prop=0.188950 sec
[20130614-15:39:53] [message] MSQosAnalyser: everything is fine.
[20130614-15:39:53] [message] MSBitrateController: current state is Init
[20130614-15:39:54] [message] bandwidth usage: audio=[d=24.4,u=24.4] video=[d=0.0,u=0.0] kbit/sec
[20130614-15:39:54] [message] Thread processing load: audio=13.079607 video=0.000000
[20130614-15:39:55] [message] bandwidth usage: audio=[d=24.3,u=24.1] video=[d=0.0,u=0.0] kbit/sec
[20130614-15:39:55] [message] Thread processing load: audio=12.779621 video=0.000000
[20130614-15:39:55] [message] cb_nict_kill_transaction (id=8)
[20130614-15:39:55] [message] free transaction resource 8 571bae9b359660c116b7d6c26f0035cd
[20130614-15:39:55] [message] free nist resource
[20130614-15:39:55] [message] keep alive: 0
[20130614-15:39:55] [message] eXosip: Keep Alive sent on UDP!
[20130614-15:39:55] [message] eXosip: Reseting timer to 10s before waking up!
[20130614-15:39:56] [message] bandwidth usage: audio=[d=24.2,u=24.7] video=[d=0.0,u=0.0] kbit/sec
[20130614-15:39:56] [message] Thread processing load: audio=15.170906 video=0.000000
[20130614-15:39:56] [message] alsa: sound/wall clock skew is average=-46.980136 ms, instant=-47 ms
[20130614-15:39:57] [message] bandwidth usage: audio=[d=23.7,u=24.0] video=[d=0.0,u=0.0] kbit/sec
[20130614-15:39:57] [message] Thread processing load: audio=11.932424 video=0.000000
[2013061...