ataraxia%ethereal --sync /tmp/foo.log
The program 'ethereal' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadLength (poly request too large or internal Xlib length erro'.
  (Details: serial 50620 error_code 16 request_code 1 minor_code 0)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)
ataraxia%ethereal --version
ethereal 0.10.14

Copyright 1998-2005 Gerald Combs <gerald@ethereal.com>.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compiled with GTK+ 2.8.8, with GLib 2.8.4, with libpcap 0.9.1, with libz 1.2.2,
with libpcre 6.4, with Net-SNMP 5.2.2, with ADNS.

Running with libpcap version 0.9.1 on FreeBSD 6.0-RELEASE.
ataraxia%