We should hear from Hugo on this. It's within reason that he modified the letters a little bit. Also, you may want to "un-kern" (kern to the right) the "a" in your sample image. That may help the font algorithm thing.

[edit] Nevermind abot the "a" - I took a look at the link and it seems it was pulled properly. Damn, that's a sweet engine. too bad it wasn't around six years ago.

Bruno