Reeeeeeeally close. Zoom in as far as you can on your browser, take a screenshot, put it into a graphics program and keep zooming. It's hidden right down in the pixels. You might have to lean in right up close to the screen. It's really very impressive - he must have created a custom font just to get it in there.

Oh, and if you don't see anything, you're probably looking at the wrong letter. I forget which one it was - a vowel, I think? Better check all of them.

hS