[syslog-ng] Solaris 10: Insufficient buffer space for retrieving STREAMS log message

Hi, I'm running the latest version compiled on Solaris 10 It runs ok for a while but then I get this: syslog-ng[18894]: Insufficient buffer space for retrieving STREAMS log message; res='2' and then nothing new logs apart from the "-- MARK --" lines I've seen a couple of references to this problem here https://lists.balabit.hu/pipermail/syslog-ng/2007-September/010690.html but the patches mentioned are all now in the downloaded src. Is there any other reason for this behaviour? Regards Andy