I wasn't going to complain but since someone else experienced it, they are missing for me on Google Chrome on Ubuntu 12.04.
It appears your browser is not applying the faux-bolding to that font that the web page expected. This is what I see in Safari: http://d.pr/i/cI7f
Looks perfectly fine to me, guess it must be some kind of problem specific to your setup.
Most of the page is in Verdana, and looks fine. Some parts of the page are in Vegur Light Regular, and while it works when used in headings, it's too light for body copy, even if pseudo-bolded (it's not a full pixel wide on most screens). There are only a handful of lines set in Vegur at body size in the article.