**Do you want to request a *feature* or report a *bug*?**
Bug

**What is the current behavior?**
I've started recieving this warning about my SVGs which is using [feGaussianBlur](https://developer.mozilla.org/en-US/docs/Web/SVG/Element/feGaussianBlur): 
`Warning: Expected server HTML to contain a matching <feGaussianBlur> in <filter>.`

**What is the expected behavior?**
Should be no warnings because there are no difference.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
Such behavior started right after updating to `React 16.0.0-rc.3` and never happened with `React 15.6.1`
<div suppressHydrationWarning={true}><div /></div>,
        ));
      it('can explicitly ignore reconnecting reordered children', () =>
        expectMarkupMatch(
          <div suppressHydrationWarning={true}><div /><span /></div>,
          <div suppressHydrationWarning={true}><span /><div /></div>,
        ));
      it('can not deeply ignore reconnecting reordered children', () =>
        expectMarkupMismatch(
          <div suppressHydrationWarning={true}><div><div /><span /></div></div>,
          <div suppressHydrationWarning={true}><div><span /><div /></div></div>,
        ));
    });
    
    it('should error reconnecting a div with different dangerouslySetInnerHTML', () =>
      expectMarkupMismatch(
        <div dangerouslySetInnerHTML={{__html: "<span id='child1'/>"}} />,
        <div dangerouslySetInnerHTML={{__html: "<span id='child2'/>"}} />,
      ));
    it('can explicitly ignore reconnecting a div with different dangerouslySetInnerHTML', () =>
      expectMarkupMatch(
        <div dangerouslySetInnerHTML={{__html: "<span id='child1'/>"}} />,
        <div
          dangerouslySetInnerHTML={{__html: "<span id='child2'/>"}}
          suppressHydrationWarning={true}
        />,
      ));
  });
});