<h3 dir="auto">Problem description</h3>
<p dir="auto">I recently updated material-ui from 0.18.2 to 0.18.4 and noticed that the buttons in my application have a unusual white gap on the bottom of the buttons with a containerElement attached to it (the element is a  react element.</p>
<p dir="auto">I switched back to 0.18.2 and the gap seized to exist. I upgrade to 0.18.3 and it still didn't appear until I upgraded to 0.18.4.</p>
<p dir="auto">The difference seems to be that the button now has a overflow: hidden attribute to it whereas the other buttons do not show this attribute at all.</p>
<h3 dir="auto">Link to minimal working code that reproduces the issue</h3>
<p dir="auto">You can see this problem on the demo where a RaisedButton</p>
<p dir="auto"><br>
has the gap when you hover over it. I don't see this problem in other buttons.</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/9777005/27594080-de05e530-5b26-11e7-8183-d0dc82bacd92.png"><img src="https://user-images.githubusercontent.com/9777005/27594080-de05e530-5b26-11e7-8183-d0dc82bacd92.png" alt="image" style="max-width: 100%;"></a></p>
<h3 dir="auto">Versions</h3>
<ul dir="auto">
<li>Material-UI: 0.18.4</li>
<li>React: 15.6.1</li>
<li>Browser: Chrome 58.0.3029.110 (64-bit)</li>
</ul>
<p dir="auto">The latest release 0.18.4 adds <code class="notranslate">overflow: hidden;</code> to a containerElement on RaisedButton. This is not happening with 0.18.3. It increases the height of the button and displays a white border at the bottom of the button,</p>
<p dir="auto">Also checked FlatButton, which still works properly.</p>
<p dir="auto">Here is a link to a reproduction:<br>
<a href="https://www.webpackbin.com/bins/-KnZlC-OMVsBCErCmgGD" rel="nofollow">https://www.webpackbin.com/bins/-KnZlC-OMVsBCErCmgGD</a></p>
<p dir="auto">EDIT: for convenience, here is a link to webpackbin with 0.18.3<br>
<a href="https://www.webpackbin.com/bins/-KnZuTGm_5ZPX8yRYMgR" rel="nofollow">https://www.webpackbin.com/bins/-KnZuTGm_5ZPX8yRYMgR</a></p>