… using Chrome 9.0.597.107 on Ubuntu 10.04 LTS, I am noticing that many of the underscores are missing (e.g. I see ‘link to’ rather than ‘link_to’ and ‘url for’ rather than ‘url_for’).
Everything looks good on Windows 7 with Chrome and Ubuntu with Firefox.
If I had to guess, I’d guess that it’s a problem with the font used for code samples where on Ubuntu the characters that descend below the baseline are sometimes mangled (e.g. ‘resource :geocoder’ in section 2.5 is mangled while ‘belongs_to :magazine’ in section 2.7 is not).
When an underscore is mangled, it gets thinned to the point of invisibility.
Sorry, I have no idea how to fix this, but I have forwarded this issue to the Chrome people as well.