Sorry, I forgot a couple:

The belief that women are only paid $0.65 (or $0.70 or... pick your own made up number) on the dollar for doing the same work as men. Still shamelessly promoted despite the complete lack of any court actions for what would be *completely illegal behaviour*.
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The idea that minorities literally cannot commit acts of racism/sexism. This one is just starting to gain currency.
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That discriminating for group X, for example in hiring, because of race/sex/age is somehow not racist/sexist/ageist discrimination against everybody  not in group X.