From: Mike N. 

On Sun, 01 Jan 2006 20:55:53 -0800, Ellen K.  wrote:

>OK, stupid question department:  How can a file with a JPG extension be
>seen by the machine as anything but a JPG?   (Or is this the exploit?)

   IE established a convention early on of sniffing the contents of a file
to determine its true type.   Possibly this aided rendering anonymous or
mis-identified streams from some web sites.   The autosniff feature is of
dubious value but not the cause of this exploit.

--- BBBS/NT v4.01 Flag-5