In http://en.wikipedia.org/wiki/Special:Preferences#preftab-1 Math Always render PNG HTML if very simple or else PNG HTML if possible or else PNG Leave it as TeX (for text browsers) Recommended for modern browsers MathML if possible (experimental)
Well gosh why don't they say what is Recommended for modern browsers?
What if you went to a restaurant and one dish was called "Recommended for modern eaters"?