Your post got me interested in Ethereal so I downloaded it and thought id give it a go.

However when I start it up a cmd prompt window opens up with this message:
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(ethereal.exe:1828): Gtk-CRITICAL **: file gtkwindow.c: line 3107 (gtk_window_re
size): assertion `height > 0' failed

(ethereal.exe:1828): Gtk-CRITICAL **: file gtkwindow.c: line 3107 (gtk_window_re
size): assertion `height > 0' failed
-----------------------------------------------------------------------------------------------------------------

Have you ever seen this before?

I tried re-installing it but still go the same result.