I have a font problem

I have a font problem. Or maybe it's a typeface problem. Regardless, on certain sites I read, the text looks fucking ridiculous, like this:



I assume the problem's on my end, because that example comes from a designer's website (complaining about the whole Forbes "snooty designer" article controversy). I doubt that the text is meant to look undulating, of uneven size, and with chunks missing from it. I have tried sizing that shit up and down, tried loading it in firefox and in chrome, and it always looks mottled and messed up.