Wow, nice catch. Sadly it looks very intentional. You can see the Yahoo version has been edited to include the date "2-7-14", even though the copyright still says 1995.[1] It is indeed a 1995 cartoon.[2]

I can't imagine Scott Adams being OK with this.

[1]: http://imgur.com/kBHJ0eq (thanks to another commenter for the image)

[2]: http://dilbert.com/strips/comic/1995-01-28/