[zell12]

Stefan: Oh look, someone needs help on the forums!
Stefan: Lets see... someone attached a file.
Unixmad: Don't download anymore viruses, or you're fired!
Stefan: Yeah, yeah <insert french cusses here>
Stefan deletes .jpg attachment because he is peranoid.
Stefan: Please attach an image, you attached something that looked like a .exe

So, either he is format-blind or Unixmad cloned himself and made a new Stefan.