The GFM Example doesn't seem to work.

[missbach]

The GFM doesn't get parsed correctly at the example page. (Linked from the GFM help). Take a look at the comments section where some folks decided to render the markdown themselves.

[nyeates]

Agreed, I too saw this off the bat. I am wondering if it was done because there was no easy way to show the parsed output of that file directly?