The King of Limbs Secret/Hidden Track

I'm sure all of you by now have listen to the King of Limbs by Radiohead but
for the people who downloaded from the website received a almost 5 MB
album art.  Seems fishy doesn't it?  5 Megabits for a picture file? This has made many people to believe there is something hidden within this file.

Since the release of Radiohead's latest album people across the Internet have come up with theories on hidden tracks and/or a second CD; anything to add to the very short album ( not even 40 minutes in length ). Even though,  members of the band have said that they were more interested in release only short LPs from now on.

I have trade editing the album art on my own and it seems like there is something there. You can try to edit it on your own.

First get the album art, it's exact size is 4.84 MB.
If you don't have it, try google.

Take the album art file and change it from a jpeg to a mp3.
Right-click and click rename.  Then change "thekingoflimbs.jpg" to "thekingoflimbs.mp3".

Then get a program like Audacity, and open the new "thekingoflimbs.mp3" file.

Now try editing it and see what you can make of it!
Let me know what you find!

PS. Try stretching the song out to 4 minutes or
changing the pitch or octave.