Doesn't read data parameter correctly

[[email protected]…]

The HTML file (shortened):

<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
<div class="item" id="item" data-videoid="10150620056663015">Test</div>

When I call:

$('#item').data('videoid')

I get the videoid 10150620056663016 (last number changed)

[Rick Waldron]

Duplicate of #7579.