@ Mark - False. Realistically speaking, Afrikaners don't particularly give a damn about that. Afrikaans media is in abundance in SA and many English publications have an Afrikaans counterpart and vice-versa. Old generation Afrikaners do have some trouble with fluency, but the new generation have no qualms about English being the standard lingual middle ground in SA and many are pretty good at speaking it (whilst the vast majority of the English here are monolingual.) You could pin that to globalisation and the information age in a sense.
@ Asker - Your average Afrikaner does not hate the English. In fact, we generally tend to get along without a hitch, despite the fact that some stereotyping exists (on *both* sides of the fence, make no mistake) but really, I wouldn't classify that as real animosity. Afterall, that's to be anticipated when there are cultural differences involved.
There tends to be one *type* of Afrikaans people that harbor real hostility towards the English, and that would be the staunch right-wing Afrikaners that live in very conservative Afrikaans areas. In fact, the first answer gave the perfect example of the sort of place I'm talking about - Bloemfontein is notorious for that kind of mentality. These hyper-conservatives (I'm sure you'd have some in your own country...) hate the English because they tend to be stereotypically liberal people - conservatives generally have clashing views - and in addition to that they may hold grudges due to very tragic, very damaging historical conflicts. As Rasputin mentioned, thousands of our innocent women and children were slaughtered in concentration camps at the hands of the British.
Mind you, plenty of Afrikaners (my generation or otherwise) do not agree with the people I've mentioned above. A lot of us can't stand them and think they do a lot of damage to our reputation.
Afrikaner, cool with English people.