I have noticed the same problem when opening captures with File/Open... The problem doesn't occur every time, but very often. I haven't found any pattern yet.
> I wonder if this is the same thing I noticed... I noticed that it occured > when I open a capture file through a file association in explorer, but > didn't happen when I was doing a live capture, or when I ran ethereal and > then opened a file through the open dialog. Have you tried either of these > ways? >