Another data point for you, Opera on Gentoo Linux:
http://img705.imageshack.us/img705/4621/1231150731.png
To me it looks pretty similar to your Firefox screenshot.
That isn't using the right font either. The 'e' is all wrong.
http://img705.imageshack.us/img705/4621/1231150731.png
To me it looks pretty similar to your Firefox screenshot.
From left to right: Firefox (Win), Chrome (Win), Safari (Win), Safari (Mac)
Firefox renders the font way too light, Chrome (this version at least) falls back to a default font, and Safari on Windows uses incorrect kerning and renders the some characters too narrow. Only Safari on Mac renders the font acceptably (except from the heavy diagonal on the capital N and the oversized apostrophe, maybe).