[syslog-ng] problems after upgrading to v.2.3 linux kernel

[Brian Johnson]

I've been running syslog-ng on linux 2.2.14 for awhile, and it's been
working fine, I just upgraded to 2.3.40 and not syslog-ng dies shortly
after starting.  I'm running syslog-ng 1.3.13 (I was running 1.3.12 and
that had the same problem).
when I run syslog-ng -d -v I get this:
  io.c: listening on fd 3
  io.c: Preparing fd 4 for reading
  syslog-ng version 1.3.13 starting
  io.c: Preparing fd 5 for writing
  io.c: Preparing fd 6 for writing
  io.c: Preparing fd 7 for writing
  Garbage collecting while idle...
  Objects alive: 126, garbage collected: 0
  io.c: Preparing fd 8 for reading
  io.c: sockaddr2info(): Unsupported address family 18154.
  Aborted

in my syslog-ng.conf file I have:
  options { long_hostnames(on); sync(0); };
  source src { unix-stream("/dev/log"); file("/proc/kmsg"); internal();
};

and my destinations are all just various normal files...

is this a bug, or something I'm doing wrong?  this exact configuration
did work fine with the linux 2.2.14 kernel...